Difference between revisions of "Applications-of-GeoGebra/C2/Introduction-to-Trigonometry-Using-GeoGebra/English"

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||'''Narration'''
 
||'''Narration'''
 
|-
 
|-
−
| | '''Slide Number 1'''
+
|| '''Slide Number 1'''
  
 
'''Title Slide'''
 
'''Title Slide'''
−
| | Welcome to this tutorial on '''Introduction to Trigonometry using GeoGebra'''.
+
|| Welcome to this tutorial on '''Introduction to Trigonometry using GeoGebra'''.
 
|-
 
|-
−
| | '''Slide Number 2'''
+
|| '''Slide Number 2'''
  
 
'''Learning Objectives'''
 
'''Learning Objectives'''
−
| | In this tutorial, we will learn how to construct,  
+
|| In this tutorial, we will learn how to construct,  
  
−
*A unit circle
+
A unit circle
−
*A right triangle inside the unit circle using '''GeoGebra'''.
+
 
 +
A right triangle inside the unit circle using '''GeoGebra'''.
 
|-
 
|-
−
| | '''Slide Number 3'''
+
|| '''Slide Number 3'''
  
 
'''Pre-requisites'''
 
'''Pre-requisites'''
−
| | To follow this tutorial, you should be familiar with  
+
|| To follow this tutorial, you should be familiar with  
−
*the '''GeoGebra interface''',
+
the '''GeoGebra interface''',
−
*basics of geometry, trigonometry and graphs.
+
 
 +
basics of geometry, trigonometry and graphs.
 
|-
 
|-
−
| | '''Slide Number 4'''
+
|| '''Slide Number 4'''
  
 
'''System Requirement'''
 
'''System Requirement'''
−
| | Here I am using-
+
|| Here I am using-
 +
 
 +
Ubuntu Linux OS version 14.04
  
−
*Ubuntu Linux OS version 14.04
+
GeoGebra 5.0.388.0-d.
−
*GeoGebra 5.0.388.0-d
+
 
|-
 
|-
−
| | Show the '''GeoGebra''' window.
+
|| Show the '''GeoGebra''' window.
−
| | I have already opened the '''GeoGebra''' interface.
+
|| I have already opened the '''GeoGebra''' interface.
 
|-
 
|-
−
| | Click on '''Move Graphics View''' tool.
+
|| Click on '''Move Graphics View''' tool.
−
| | Click on '''Move Graphics View''' tool.
+
|| Click on '''Move Graphics View''' tool.
 
|-
 
|-
−
| | Drag the '''origin''' to the center.
+
|| Drag the '''origin''' to the centre.
−
| | Drag the '''origin''' to the center of the '''Graphics''' view.
+
|| Drag the '''origin''' to the centre of the '''Graphics''' view.
 
|-
 
|-
−
| | Click on '''Zoom In''' tool> click on screen in '''Graphics''' view.
+
|| Click on '''Zoom In''' tool >> click on screen in '''Graphics''' view.
−
| | Under '''Move Graphics View''', click on '''Zoom In''' tool.
+
|| Under '''Move Graphics View''', click on '''Zoom In''' tool.
  
 
Then click on screen in '''Graphics''' view.
 
Then click on screen in '''Graphics''' view.
Line 51: Line 54:
 
| | Click on''' Slider''' tool and then click on the screen in '''Graphics''' view.
 
| | Click on''' Slider''' tool and then click on the screen in '''Graphics''' view.
 
|-
 
|-
−
| | Point to the dialog box.
+
|| Point to the dialogue box.
−
| | '''Slider''' dialog-box appears in the '''Graphics''' view.
+
|| '''Slider''' dialogue appears in the '''Graphics''' view.
 
|-
 
|-
−
| | Point to '''Number''' radio .
+
|| Point to '''Number''' radio.
−
| | By default, the '''Number''' radio-button is selected.
+
|| By default, the '''Number''' radio-button is selected.
 
|-
 
|-
−
| | Type Name as '''radius''' .
+
|| Type Name as '''radius''' .
−
| | In the '''Name''' field, type '''radius'''.
+
|| In the '''Name''' field, type '''radius'''.
 
|-
 
|-
−
| | Change '''Min, Max''' and '''Increment''' values.
+
|| Change '''Min, Max''' and '''Increment''' values.
−
| | Set '''Min''' value as 1, '''Max''' value 5 and '''Increment''' of 0.1.
+
|| Set '''Min''' value as 1, '''Max''' value 5 and '''Increment''' of 0.1.
 
|-
 
|-
−
| | Click '''OK''' button.
+
|| Click '''OK''' button.
−
| | Click '''OK''' button.
+
|| Click '''OK''' button.
 
|-
 
|-
−
| | Point to the slider.
+
|| Point to the slider.
  
 
Drag to show the changing values.
 
Drag to show the changing values.
−
| | This creates a '''number slider''' named '''radius'''.
+
|| This creates a '''number slider''' named '''radius'''.
  
 
Using the '''slider''', radius can be changed from 1 to 5 in increments of 0.1.
 
Using the '''slider''', radius can be changed from 1 to 5 in increments of 0.1.
 
|-
 
|-
−
| | Click on '''Slider''' tool >> click on screen in '''Graphics''' view.
+
|| Click on '''Slider''' tool >> click on screen in '''Graphics''' view.
−
| | Click on '''Slider''' tool and then click on the screen in '''Graphics''' view.
+
|| Click on '''Slider''' tool and then click on the screen in '''Graphics''' view.
 
|-
 
|-
−
| | Point to the dialog box.
+
|| Point to the dialogue box.
−
| | '''Slider''' dialog box appears.
+
|| '''Slider''' dialogue box appears.
 
|-
 
|-
−
| | Click on '''Angle''' radio button.
+
|| Click on '''Angle''' radio button.
−
| | This time, select '''Angle''' radio button.
+
|| This time, select '''Angle''' radio button.
 
|-
 
|-
−
| | Change '''Min, Max''' and '''Increment''' values.
+
|| Change '''Min, Max''' and '''Increment''' values.
−
| | '''Min, Max''' and '''Increment''' should be 0º, 360º and 1º, respectively.
+
|| '''Min, Max''' and '''Increment''' should be 0<sup>0</sup>, 360<sup>0</sup> and 1<sup>0</sup>, respectively.
 
|-
 
|-
−
| | Click '''OK''' .
+
|| Click '''OK'''.
−
| | Click '''OK'''.
+
|| Click '''OK'''.
 
|-
 
|-
−
| | Drag to show the changing values.
+
|| Drag to show the changing values.
−
| | This sets up '''alpha''' slider, on which angle '''alpha (α)''' can be changed from 0º to 360º.
+
|| This sets up '''alpha''' slider, on which angle '''alpha (α)''' can be changed from 0<sup>0</sup> to 360<sup>0</sup>.
 
|-
 
|-
−
| | Click on '''Circle with center and radius''' tool.
+
|| Click on '''Circle with Center and radius''' tool.
−
| | Click on '''Circle with Center and Radius''' tool.
+
|| Click on '''Circle with Center and Radius''' tool.
 
|-
 
|-
−
| | Place the cursor on the '''origin''' and click on it.
+
|| Place the cursor on the '''origin''' and click on it.
−
| | Place the cursor on the '''origin''' (0,0) and click on it.
+
|| Place the cursor on the '''origin''' (0,0) and click on it.
 
|-
 
|-
−
| |Text box
+
||Text box
−
| | '''Circle with Centre and Radius''' text box appears.
+
|| '''Circle with Centre and Radius''' text box appears.
 
|-
 
|-
−
| | Type '''radius''' in the text box, click '''OK'''.
+
|| Type '''radius''' in the text box, click '''OK'''.
−
| | In text box, type '''radius''' and click '''OK''' .
+
|| In text box, type '''radius''' and click '''OK''' .
 
|-
 
|-
−
| | Point to the circle at the center.
+
|| Point to the circle at the center.
−
| | A circle with center '''A''' at the '''origin''' is drawn.
+
|| A circle with center '''A''' at the '''origin''' is drawn.
  
 
Please note, we are using '''A''' for '''O'''(0,0).
 
Please note, we are using '''A''' for '''O'''(0,0).
 
|-
 
|-
−
| | Drag the '''radius''' slider from 1 to 5 but leave it at 1 finally.
+
|| Drag the '''radius''' slider from 1 to 5 but leave it at 1 finally.
−
| | Drag the '''radius''' slider from 1 to 5 to change the radius of the circle.
+
|| Drag the '''radius''' slider from 1 to 5 to change the radius of the circle.
  
 
Drag it to 1 to have a unit circle.
 
Drag it to 1 to have a unit circle.
 
|-
 
|-
−
| | Click on '''Segment''' tool>>click on circumference at the '''x axis'''.
+
|| Click on '''Segment''' tool >> click on circumference at the '''x axis'''.
−
| | Click on '''Segment''' tool.
+
|| Click on '''Segment''' tool.
  
 
Click on the circumference of the circle at the '''x Axis'''.
 
Click on the circumference of the circle at the '''x Axis'''.
Line 120: Line 123:
 
This creates '''point B'''.
 
This creates '''point B'''.
 
|-
 
|-
−
| | Click on '''point A'''.
+
|| Click on '''point A'''.
  
 
Point to '''segment AB'''.
 
Point to '''segment AB'''.
−
| | Then click on '''point A''' to draw '''segment AB'''.
+
|| Then click on '''point A''' to draw '''segment AB'''.
 
|-
 
|-
−
| | Click on '''Angle with Given Size''' tool.
+
|| Click on '''Angle with Given Size''' tool.
−
| | Now click on '''Angle with Given Size''' tool.
+
|| Now click on '''Angle with Given Size''' tool.
 
|-
 
|-
−
| | Click on '''point B'''>>'''point A'''.
+
|| Click on '''point B''' >> '''point A'''.
−
| | Click on '''point B''', then '''point A'''.
+
|| Click on '''point B''', then '''point A'''.
 
|-
 
|-
−
| | Point to the '''Angle with Given Size'''.
+
|| Point to the '''Angle with Given Size'''.
−
| | '''Angle with Given Size''' text-box appears.
+
|| '''Angle with Given Size''' text-box appears.
 
|-
 
|-
−
| | Point to '''Angle with Given Size''' text box.
+
|| Point to '''Angle with Given Size''' text box.
−
| | In the text box, delete '''45º''' and select '''alpha α''' from the symbol menu.
+
|| In the text box, delete '''45<sup>0</sup>''' and select '''alpha α''' from the symbol menu.
 
|-
 
|-
−
| | Point to '''counter-clockwise''' radio button.
+
|| Point to '''counter-clockwise''' radio button.
−
| | Leave direction at '''counter-clockwise''', click '''OK'''.
+
|| Leave direction at '''counter-clockwise''', click '''OK'''.
 
|-
 
|-
−
| |
+
||
−
| | '''Angle B'AB (B prime A B)''' is created which is = '''beta β''' which is = '''alpha α'''.
+
|| '''Angle B'AB (B prime A B)''' is created which is = '''beta β''' which is = '''alpha α'''.
 
|-
 
|-
−
| | Drag the '''α''' slider.
+
|| Drag the '''α''' slider.
−
| | Drag the '''alpha α''' slider from '''0º''' to '''360º'''.
+
|| Drag the '''alpha α''' slider from '''0<sup>0</sup>''' to '''360<sup>0</sup>'''.
 
|-
 
|-
−
| |
+
||
−
| | '''B' (B prime)''' moves in counter clockwise direction around the circle as '''alpha α''' increases.
+
|| '''B' (B prime)''' moves in counter clockwise direction around the circle as '''alpha α''' increases.
 
|-
 
|-
−
| | (ideal angle is between 50-60 degree)
+
||(ideal angle is between 50-60 degree)
−
| | Now drag the '''alpha α''' slider so that '''beta β''' value is between '''50''' and '''60º'''.
+
|| Now drag the '''alpha α''' slider so that '''beta β''' value is between '''50''' and '''60<sup>0</sup>'''.
 
|-
 
|-
−
| | Click on '''Point''' tool>> click outside the circle>> Point to '''point C'''.
+
|| Click on '''Point''' tool>> click outside the circle >> Point to '''point C'''.
−
| | Click on '''Point''' tool and click outside the circle to create '''point C'''.
+
|| Click on '''Point''' tool and click outside the circle to create '''point C'''.
 
|-
 
|-
−
| | Double click on C in the '''Algebra''' view.
+
|| Double click on C in the '''Algebra''' view.
−
| | In the '''Algebra''' view, double-click on point '''C''' to change its coordinates.
+
|| In the '''Algebra''' view, double-click on point '''C''' to change its coordinates.
 
|-
 
|-
−
| | Change co-ordinates of '''point C''' to '''(x(B'), 0)''' >> press enter.
+
|| Change co-ordinates of '''point C''' to '''(x(B'), 0)''' >> press enter.
−
| | Type '''x(B') (x B prime)''' as '''x-coordinate''' and '''y-coordinate''' as zero and press '''Enter'''.
+
|| Type '''x(B') (x B prime)''' as '''x-coordinate''' and '''y-coordinate''' as zero and press '''Enter'''.
 
|-
 
|-
−
| | Move the cursor to point C.
+
|| Move the cursor to point C.
−
| | This will shift point '''C''' right under '''B' (B prime)'''.
+
|| This will shift point '''C''' right under '''B' (B prime)'''.
 
|-
 
|-
−
| | Click on '''Segment''' tool>> click on points '''B'''' and '''A'''.
+
|| Click on '''Segment''' tool >> click on points '''B'''' and '''A'''.
−
| | Click on '''Segment''' tool.
+
|| Click on '''Segment''' tool.
  
 
Click on points '''B' (B prime)''' and '''A''' to join them.
 
Click on points '''B' (B prime)''' and '''A''' to join them.
 
|-
 
|-
−
| |
+
||
−
| | This forms the hypotenuse of the right triangle '''ACB' (A C B prime)'''.
+
|| This forms the hypotenuse of the right triangle '''ACB' (A C B prime)'''.
 
|-
 
|-
−
| | Click on '''Segment''' tool>>click on points '''B'''' and '''C'''.
+
|| Click on '''Segment''' tool >> click on points '''B'''' and '''C'''.
−
| | Now using '''Segment''' tool join '''B' (B prime)''' and '''C'''.
+
|| Now using '''Segment''' tool join '''B' (B prime)''' and '''C'''.
 
|-
 
|-
−
| | Point to the right angled triangle AB'C and its angles.
+
|| Point to the right angled triangle AB'C and its angles.
−
| | A right angle is formed at '''C'''- angle '''ACB' (A C B prime)'''.
+
|| A right angle is formed at '''C'''- angle '''ACB' (A C B prime)'''.
 
|-
 
|-
−
| |
+
||
−
| | Angle '''B'AC (B prime A C)''' is equal to '''alpha αº''' which is equal to '''beta βº'''.
+
|| Angle '''B'AC (B prime A C)''' is equal to '''alpha α<sup>0</sup>''' which is equal to '''beta β<sup>0</sup>'''.
 
|-
 
|-
−
| | Move the '''α''' slider from 0º to 360º .
+
|| Move the '''α''' slider from 0<sup>0</sup> to 360<sup>0</sup>.
−
| | Drag the '''alpha α''' slider from 0º to 360º to see how '''alpha α''' changes.
+
|| Drag the '''alpha α''' slider from 0<sup>0</sup> to 360<sup>0</sup> to see how '''alpha α''' changes.
 
|-
 
|-
−
| | '''Formatting the triangle'''
+
|| '''Formatting the triangle'''
−
| | Let us enhance the visibility of the triangle.
+
|| Let us enhance the visibility of the triangle.
 
|-
 
|-
−
| | Double click on angle '''β'''>>Select '''Object Properties'''.
+
|| Double click on angle '''β''' >> Select '''Object Properties'''.
−
| | Double-click on angle '''beta β'''.
+
|| Double-click on angle '''beta β'''.
  
 
Click on '''Object properties'''.
 
Click on '''Object properties'''.
 
|-
 
|-
−
| | Click on '''color''' tab.
+
|| Click on '''Color''' tab.
−
| | Click on the '''color''' tab.
+
|| Click on the '''Color''' tab.
  
 
Leave color as green.
 
Leave color as green.
 
|-
 
|-
−
| | Drag the '''Opacity''' slider to 25.
+
|| Drag the '''Opacity''' slider to 25.
−
| | Increase '''Opacity''' to 25.
+
|| Increase '''Opacity''' to 25.
 
|-
 
|-
−
| | Click on '''Style''' tab>> drag '''size''' slider to 50.
+
|| Click on '''Style''' tab >> drag '''size''' slider to 50.
−
| | Click on '''Style''' tab.
+
|| Click on '''Style''' tab.
  
 
Increase '''size''' to 50.
 
Increase '''size''' to 50.
  
 
|-
 
|-
−
| | Change '''Decoration''' to '''arrow pointing counter-clockwise'''.
+
|| Change '''Decoration''' to '''arrow pointing counter-clockwise'''.
−
| | Change the '''Decoration''' to '''arrow pointing counter-clockwise'''.
+
|| Change the '''Decoration''' to '''arrow pointing counter-clockwise'''.
 
|-
 
|-
−
| | Close the '''Preferences''' box.
+
|| Close the '''Preferences''' dialogue-box.
−
| | Close the '''Preferences''' dialog-box.
+
|| Close the '''Preferences''' dialogue-box.
 
|-
 
|-
−
| |
+
||
−
| | I will now change the properties of the triangle segments.
+
|| I will now change the properties of the triangle segments.
 
|-
 
|-
−
| | Double click on '''segment AB''''>>Select '''Object Properties'''.
+
|| Double click on '''segment AB'''' >> Select '''Object Properties'''.
−
| | To change the color of the '''segments''', double-click on '''segment AB' (A B prime)'''.
+
|| To change the color of the '''segments''', double-click on '''segment AB' (A B prime)'''.
  
 
Select '''Object Properties'''.
 
Select '''Object Properties'''.
 
|-
 
|-
−
| | Click on '''color''' tab and select '''blue'''.
+
|| Click on '''Color''' tab and select '''blue'''.
−
| | Click on '''color''' tab.
+
|| Click on '''Color''' tab.
  
 
Select '''blue'''.
 
Select '''blue'''.
 
|-
 
|-
−
| | Double click on '''segment CB''''>>Select '''Object Properties'''.
+
|| Double click on '''segment CB''''>> Select '''Object Properties'''.
  
−
Click on '''color''' tab and select '''red'''.
+
Click on '''Color''' tab and select '''red'''.
  
−
Double click on '''segment AB'''>>Select '''Object Properties'''.
+
Double click on '''segment AB'''>> Select '''Object Properties'''.
  
−
Click on '''color''' tab and select '''orange'''.
+
Click on '''Color''' tab and select '''orange'''.
−
| | Similarly, change the colors of '''CB' (C B prime)''' to red and of '''AB''' to orange.
+
|| Similarly, change the colors of '''CB' (C B prime)''' to red and of '''AB''' to orange.
 
|-
 
|-
−
| | Right-click on '''segment AB''''>>Rename>>type '''c''' in '''name''' field>>click '''OK'''.
+
|| Right-click on '''segment AB''''>> Rename >> type '''c''' in '''name''' field >> click '''OK'''.
−
| | To rename the '''segments''', right-click on '''segment AB' (A B prime)'''.
+
|| To rename the '''segments''', right-click on '''segment AB' (A B prime)'''.
  
 
Choose '''Rename''' option.
 
Choose '''Rename''' option.
Line 241: Line 244:
 
Type '''c''' in the '''name''' field and click '''OK'''.
 
Type '''c''' in the '''name''' field and click '''OK'''.
 
|-
 
|-
−
| | Right-click on '''segment CB''''>>'''Rename'''>>type '''a''' in '''name''' field>>click '''OK'''.
+
|| Right-click on '''segment CB'''' >> '''Rename''' >> type '''a''' in '''name''' field >> click '''OK'''.
  
−
Right-click on '''segment AC'''>>'''Rename'''>>type '''b''' in '''name''' field>>click '''OK'''.
+
Right-click on '''segment AC''' >> '''Rename''' >> type '''b''' in '''name''' field >> click '''OK'''.
−
| | Similarly, rename '''CB' (C B prime)''' to '''a''' and '''AC''' to '''b'''.
+
|| Similarly, rename '''CB' (C B prime)''' to '''a''' and '''AC''' to '''b'''.
 
|-
 
|-
−
| | Click on '''style''' tab>>point to '''line thickness''' and '''line style''' options.
+
|| Click on '''style''' tab >> point to '''line thickness''' and '''line style''' options.
−
| | If you wish, you may change the '''Line Thickness''' and the '''Line Style''' in the '''Style''' tab.
+
|| If you wish, you may change the '''Line Thickness''' and the '''Line Style''' in the '''Style''' tab.
 
|-
 
|-
−
| | In '''Algebra'''  view, click and highlight segment '''a'''.
+
|| In '''Algebra'''  view, click and highlight segment '''a'''.
−
| | In '''Algebra''' view, click and highlight segment '''a'''.
+
|| In '''Algebra''' view, click and highlight segment '''a'''.
 
|-
 
|-
−
| | Holding '''Shift''' key down, drag and highlight '''b''' and '''c''' as well.
+
|| Holding '''Shift''' key down, drag and highlight '''b''' and '''c''' as well.
−
| | Holding the '''Shift''' key down, highlight all 3 segments.
+
|| Holding the '''Shift''' key down, highlight all 3 segments.
 
|-
 
|-
−
| | In '''Graphics''' view, click on '''Hidden''' option.
+
|| In '''Graphics''' view, click on '''Hidden''' option.
−
| | In '''Graphics''' view, click on '''Hidden''' option.
+
|| In '''Graphics''' view, click on '''Hidden''' option.
 
|-
 
|-
−
| | Point to the segments in '''Graphics''' view.
+
|| Point to the segments in '''Graphics''' view.
−
| | All three labels are hidden.
+
|| All three labels are hidden.
 
|-
 
|-
−
| | '''Switching x axis to radians'''
+
|| '''Switching x axis to radians'''
−
| | Now let us change '''x Axis''' units to '''radians'''.
+
|| Now let us change '''x Axis''' units to '''radians'''.
 
|-
 
|-
−
| | Double click on '''x axis''' in '''Graphics''' view>> '''Object properties'''.
+
|| Double click on '''x axis''' in '''Graphics''' view >> '''Object properties'''.
−
| | Double click on '''x axis''' in '''Graphics''' view then on '''Object Properties'''.
+
|| Double click on '''x axis''' in '''Graphics''' view then on '''Object Properties'''.
 
|-
 
|-
−
| | Click on '''Preferences-Graphics'''>>'''x axis'''.
+
|| Click on '''Preferences-Graphics''' >> '''x axis'''.
−
| | In the '''Object Properties''' menu, click on '''Preferences-Graphics''' then on '''x Axis'''.
+
|| In the '''Object Properties''' menu, click on '''Preferences-Graphics''' then on '''x Axis'''.
 
|-
 
|-
−
| | Check the '''Distance''' option, select '''π/2'''>>select '''Ticks''' first option.
+
|| Check the '''Distance''' option, select '''π/2''' >> select '''Ticks''' first option.
−
| | Check the '''Distance''' option, select '''pi over 2'''.
+
|| Check the '''Distance''' option, select '''pi over 2'''.
 
   
 
   
 
Select the '''Ticks''' first option.
 
Select the '''Ticks''' first option.
 
|-
 
|-
−
| | Close the '''Preferences''' box.
+
|| Close the '''Preferences''' box.
−
| | Close the '''Preferences''' box.
+
|| Close the '''Preferences''' box.
 
|-
 
|-
−
| | Point to '''x-axis'''.
+
|| Point to '''x-axis'''.
−
| | Units of '''x-axis''' are in '''radians''' with the intervals shown.
+
|| Units of '''x-axis''' are in '''radians''' with the intervals shown.
  
 
'''GeoGebra''' will convert degrees of angle '''alpha α''' to '''radians'''.
 
'''GeoGebra''' will convert degrees of angle '''alpha α''' to '''radians'''.
 
|-
 
|-
−
| |
+
||
−
| | Let us summarize.
+
|| Let us summarize.
 
|-
 
|-
−
| | '''Slide Number 5'''
+
|| '''Slide Number 5'''
  
 
'''Summary'''
 
'''Summary'''
−
| | In this tutorial, we have learnt how to use '''GeoGebra''' to construct a unit circle and a right triangle inside it.
+
|| In this tutorial, we have learnt how to use '''GeoGebra''' to construct a unit circle and a right triangle inside it.
 
|-
 
|-
−
| | '''Slide Number 6'''
+
|| '''Slide Number 6'''
  
 
'''Assignment'''
 
'''Assignment'''
−
| | As an Assignment:
+
|| As an Assignment,
  
−
*Try constructing circles with radius 2 and 3 units.
+
Try constructing circles with radius 2 and 3 units.
  
−
*Draw right triangles in these circles.
+
Draw right triangles in these circles.
  
−
*Also try different styles, opacity & thickness.
+
Also try different styles, opacity & thickness.
 
|-
 
|-
−
| | '''Slide Number 7'''
+
|| '''Slide Number 7'''
  
 
'''About Spoken Tutorial project'''
 
'''About Spoken Tutorial project'''
−
| | The video at the following link summarizes the Spoken Tutorial project.
+
|| The video at the following link summarizes the Spoken Tutorial project.
  
 
Please download and watch it.
 
Please download and watch it.
 
|-
 
|-
−
| | '''Slide Number 8'''
+
|| '''Slide Number 8'''
  
 
'''Spoken Tutorial workshops'''
 
'''Spoken Tutorial workshops'''
−
| | The '''Spoken Tutorial Project''' team conducts workshops and gives certificates.
+
|| The '''Spoken Tutorial Project''' team conducts workshops and gives certificates.
  
  
 
For more details, please write to us.
 
For more details, please write to us.
 
|-
 
|-
−
| | '''Slide Number 9'''
+
|| '''Slide Number 9'''
  
 
'''Forum for specific questions:'''
 
'''Forum for specific questions:'''
Line 324: Line 327:
  
 
Please visit this site
 
Please visit this site
 +
 
Choose the minute and second where you have the question
 
Choose the minute and second where you have the question
 +
 
Explain your question briefly
 
Explain your question briefly
 +
 
Someone from our team will answer them
 
Someone from our team will answer them
  
−
| | Please post your timed queries on this forum.
+
|| Please post your timed queries on this forum.
 
|-
 
|-
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| | '''Slide Number 10'''
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|| '''Slide Number 10'''
  
 
'''Acknowledgement'''
 
'''Acknowledgement'''
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| | '''Spoken Tutorial Project''' is funded by NMEICT, MHRD, Government of India.
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|| '''Spoken Tutorial Project''' is funded by NMEICT, MHRD, Government of India.
  
 
More information on this mission is available at this link.
 
More information on this mission is available at this link.
 
|-
 
|-
−
| |
+
||
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| | This is Vidhya Iyer from IIT Bombay signing off.
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|| This is Vidhya Iyer from IIT Bombay signing off.
  
 
Thank you for joining.
 
Thank you for joining.
 
|-
 
|-
 
|}
 
|}

Revision as of 16:44, 16 February 2018

Visual Cue Narration
Slide Number 1

Title Slide

Welcome to this tutorial on Introduction to Trigonometry using GeoGebra.
Slide Number 2

Learning Objectives

In this tutorial, we will learn how to construct,

A unit circle

A right triangle inside the unit circle using GeoGebra.

Slide Number 3

Pre-requisites

To follow this tutorial, you should be familiar with

the GeoGebra interface,

basics of geometry, trigonometry and graphs.

Slide Number 4

System Requirement

Here I am using-

Ubuntu Linux OS version 14.04

GeoGebra 5.0.388.0-d.

Show the GeoGebra window. I have already opened the GeoGebra interface.
Click on Move Graphics View tool. Click on Move Graphics View tool.
Drag the origin to the centre. Drag the origin to the centre of the Graphics view.
Click on Zoom In tool >> click on screen in Graphics view. Under Move Graphics View, click on Zoom In tool.

Then click on screen in Graphics view.

This will magnify the Graphics view.

Click on Slider tool >> click on screen Click on Slider tool and then click on the screen in Graphics view.
Point to the dialogue box. Slider dialogue appears in the Graphics view.
Point to Number radio. By default, the Number radio-button is selected.
Type Name as radius . In the Name field, type radius.
Change Min, Max and Increment values. Set Min value as 1, Max value 5 and Increment of 0.1.
Click OK button. Click OK button.
Point to the slider.

Drag to show the changing values.

This creates a number slider named radius.

Using the slider, radius can be changed from 1 to 5 in increments of 0.1.

Click on Slider tool >> click on screen in Graphics view. Click on Slider tool and then click on the screen in Graphics view.
Point to the dialogue box. Slider dialogue box appears.
Click on Angle radio button. This time, select Angle radio button.
Change Min, Max and Increment values. Min, Max and Increment should be 00, 3600 and 10, respectively.
Click OK. Click OK.
Drag to show the changing values. This sets up alpha slider, on which angle alpha (α) can be changed from 00 to 3600.
Click on Circle with Center and radius tool. Click on Circle with Center and Radius tool.
Place the cursor on the origin and click on it. Place the cursor on the origin (0,0) and click on it.
Text box Circle with Centre and Radius text box appears.
Type radius in the text box, click OK. In text box, type radius and click OK .
Point to the circle at the center. A circle with center A at the origin is drawn.

Please note, we are using A for O(0,0).

Drag the radius slider from 1 to 5 but leave it at 1 finally. Drag the radius slider from 1 to 5 to change the radius of the circle.

Drag it to 1 to have a unit circle.

Click on Segment tool >> click on circumference at the x axis. Click on Segment tool.

Click on the circumference of the circle at the x Axis.

This creates point B.

Click on point A.

Point to segment AB.

Then click on point A to draw segment AB.
Click on Angle with Given Size tool. Now click on Angle with Given Size tool.
Click on point B >> point A. Click on point B, then point A.
Point to the Angle with Given Size. Angle with Given Size text-box appears.
Point to Angle with Given Size text box. In the text box, delete 450 and select alpha α from the symbol menu.
Point to counter-clockwise radio button. Leave direction at counter-clockwise, click OK.
Angle B'AB (B prime A B) is created which is = beta β which is = alpha α.
Drag the α slider. Drag the alpha α slider from 00 to 3600.
B' (B prime) moves in counter clockwise direction around the circle as alpha α increases.
(ideal angle is between 50-60 degree) Now drag the alpha α slider so that beta β value is between 50 and 600.
Click on Point tool>> click outside the circle >> Point to point C. Click on Point tool and click outside the circle to create point C.
Double click on C in the Algebra view. In the Algebra view, double-click on point C to change its coordinates.
Change co-ordinates of point C to (x(B'), 0) >> press enter. Type x(B') (x B prime) as x-coordinate and y-coordinate as zero and press Enter.
Move the cursor to point C. This will shift point C right under B' (B prime).
Click on Segment tool >> click on points B' and A. Click on Segment tool.

Click on points B' (B prime) and A to join them.

This forms the hypotenuse of the right triangle ACB' (A C B prime).
Click on Segment tool >> click on points B' and C. Now using Segment tool join B' (B prime) and C.
Point to the right angled triangle AB'C and its angles. A right angle is formed at C- angle ACB' (A C B prime).
Angle B'AC (B prime A C) is equal to alpha α0 which is equal to beta β0.
Move the α slider from 00 to 3600. Drag the alpha α slider from 00 to 3600 to see how alpha α changes.
Formatting the triangle Let us enhance the visibility of the triangle.
Double click on angle β >> Select Object Properties. Double-click on angle beta β.

Click on Object properties.

Click on Color tab. Click on the Color tab.

Leave color as green.

Drag the Opacity slider to 25. Increase Opacity to 25.
Click on Style tab >> drag size slider to 50. Click on Style tab.

Increase size to 50.

Change Decoration to arrow pointing counter-clockwise. Change the Decoration to arrow pointing counter-clockwise.
Close the Preferences dialogue-box. Close the Preferences dialogue-box.
I will now change the properties of the triangle segments.
Double click on segment AB' >> Select Object Properties. To change the color of the segments, double-click on segment AB' (A B prime).

Select Object Properties.

Click on Color tab and select blue. Click on Color tab.

Select blue.

Double click on segment CB'>> Select Object Properties.

Click on Color tab and select red.

Double click on segment AB>> Select Object Properties.

Click on Color tab and select orange.

Similarly, change the colors of CB' (C B prime) to red and of AB to orange.
Right-click on segment AB'>> Rename >> type c in name field >> click OK. To rename the segments, right-click on segment AB' (A B prime).

Choose Rename option.

Type c in the name field and click OK.

Right-click on segment CB' >> Rename >> type a in name field >> click OK.

Right-click on segment AC >> Rename >> type b in name field >> click OK.

Similarly, rename CB' (C B prime) to a and AC to b.
Click on style tab >> point to line thickness and line style options. If you wish, you may change the Line Thickness and the Line Style in the Style tab.
In Algebra view, click and highlight segment a. In Algebra view, click and highlight segment a.
Holding Shift key down, drag and highlight b and c as well. Holding the Shift key down, highlight all 3 segments.
In Graphics view, click on Hidden option. In Graphics view, click on Hidden option.
Point to the segments in Graphics view. All three labels are hidden.
Switching x axis to radians Now let us change x Axis units to radians.
Double click on x axis in Graphics view >> Object properties. Double click on x axis in Graphics view then on Object Properties.
Click on Preferences-Graphics >> x axis. In the Object Properties menu, click on Preferences-Graphics then on x Axis.
Check the Distance option, select π/2 >> select Ticks first option. Check the Distance option, select pi over 2.

Select the Ticks first option.

Close the Preferences box. Close the Preferences box.
Point to x-axis. Units of x-axis are in radians with the intervals shown.

GeoGebra will convert degrees of angle alpha α to radians.

Let us summarize.
Slide Number 5

Summary

In this tutorial, we have learnt how to use GeoGebra to construct a unit circle and a right triangle inside it.
Slide Number 6

Assignment

As an Assignment,

Try constructing circles with radius 2 and 3 units.

Draw right triangles in these circles.

Also try different styles, opacity & thickness.

Slide Number 7

About Spoken Tutorial project

The video at the following link summarizes the Spoken Tutorial project.

Please download and watch it.

Slide Number 8

Spoken Tutorial workshops

The Spoken Tutorial Project team conducts workshops and gives certificates.


For more details, please write to us.

Slide Number 9

Forum for specific questions:

Do you have questions in THIS Spoken Tutorial?

Please visit this site

Choose the minute and second where you have the question

Explain your question briefly

Someone from our team will answer them

Please post your timed queries on this forum.
Slide Number 10

Acknowledgement

Spoken Tutorial Project is funded by NMEICT, MHRD, Government of India.

More information on this mission is available at this link.

This is Vidhya Iyer from IIT Bombay signing off.

Thank you for joining.

Contributors and Content Editors

Madhurig, Nancyvarkey, PoojaMoolya, Vidhya

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