GeoGebra-5.04/C3/Create-action-object-Tools/English
Visual Cue | Narration |
Slide Number 1
Title slide |
Welcome to the Spoken Tutorial on Create Action Object Tools in GeoGebra. |
Slide Number 2
Learning Objectives
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In this tutorial we will learn about free and dependent Objects.
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Slide Number 3
System Requirement |
To record this tutorial, I am using;
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Slide Number 4
Pre-requisites |
To follow this tutorial, learner should be familiar with GeoGebra interface.
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In this tutorial we will use tangents to a circle tool created in the previous tutorial. | |
Slide Number 5
Code Files |
To practise this tutorial you need to download the zip file given in the Code files link.
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Point to the file on the Desktop.
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I have already downloaded and extracted the file to my Desktop.
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Click on Tangents to a circle tool >> click two points in the Graphics view.
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Click on Tangents to a circle tool and click two points in the Graphics view.
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Cursor on the interface. | Now I will explain about Free and Dependent Objects. |
Point to the figure. | Let us complete the figure. |
Click on Intersect tool >> click on points of intersections of the circle and tangents. | Click on the Intersect tool.
Mark points of intersection of the tangents to the circle. |
Click on Segment tool >> click on A, C >> click A, D >> click A, B. | Using the Segment tool we will join A C, A D and A B. |
Point to the Algebra view. | In the Algebra view, note that segment AC is equal to segment AD.
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Cursor on the point of contact of tangents and circle | Now let's measure the angles at the point of contact of the tangents to the circle. |
Click on Angle tool >> click on the points B, C, A.
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Click on the Angle tool and click on the points B, C, A.
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Point to the angles. | Observe that the angles alpha and beta are 90 degrees.
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Point to Algebra view.
Click on the arrow triangle next to Algebra. |
In the Algebra view, click on the arrow triangle named as Toggle Style Bar. |
Click and point to the button and drop-downs. | Auxillary Objects, Sort Objects by drop-down and fx drop-down appear. |
Click on Sort Objects by drop-down.
Point to the menu. |
Click on Sort Objects by drop-down.
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Point to the check-boxes. | This menu has,
Dependency, Object Type, Layer and Construction Order check-boxes. |
Point to Object Type check-box.
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By default, Object Type check-box is selected.
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Under Free Objects point to points A and B.
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Note that only points A and B are under Free Objects.
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Click and show the check-boxes. | You can select other check-boxes and see how the objects are sorted. |
Cursor in the Graphics view. | Now we will learn how to create a check-box. |
Click on Check Box tool >> click in the Graphics view.
Point to the dialog box. |
Click on the Check Box tool and click in the Graphics view.
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Point to the Caption text box.
Type Angles |
In the Caption text box, I will type Angles. |
Point to Select objects in construction or choose from list.
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From the Select objects drop-down, let us select Angle alpha and Angle beta.
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Point to the check-box. | Angles check-box appears in the Graphics view. |
Click on Move tool. | Let us click on Move tool to avoid clicking of other objects in the Graphics view. |
Point to the check-box in the views. | Angles check-box is shown as a Boolean Value a in the views. |
Check and uncheck the Angles check-box. | Using this check-box, we can show or hide the angles alpha and beta. |
Point to the Boolean value in the Algebra view. | In the Algebra view, Boolean Value is true when the angles are shown. |
Click on Angles check-box to show or hide the angles. | Boolean Value becomes false when they are hidden. |
Cursor on Geogebra interface. | Now we will insert an input box. |
Click on Input Box tool >> click in the Graphics view. | Click on the Input Box tool and click in the Graphics view. |
Point to Input Box. | Input Box appears in the Graphics view. |
Type Caption as Circle. | In the box, type the Caption as Circle. |
Point to Linked Object drop-down.
Select circle c>> click OK. |
In the Linked Object drop-down, select circle c.
And click on OK button in the box. |
Point to the input box. | Circle input box, along with its coordinates, appears in the Graphics view. |
Click on Move tool. | Click on Move tool to select it. |
Type B in place of A >> press Enter.
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In the input box, type B in place of A and press Enter.
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Slide Number 6
Assignment |
As an assignment,
In the circle input box change (A,B) to (B,A) and (A,A) and see what happens. Explain your observation. |
Click on Undo button. | Click on Undo button to undo the changes |
Cursor on the interface. |
Now, we will learn how to create a button. |
Click on Button tool >> click in the Graphics view. | Click on the Button tool and click in the Graphics view. |
Point to the dialog box. | The Button dialog box opens. |
Type Caption as Value. | Type Caption as Value. |
In GeoGebra Script box type,
SetValue[A, A-1] SetValue[B, B+2] SetColor[j, "Blue"] SetColor[h, "Green"] SetColor[i, "Red"] |
In GeoGebra Script box type the following script.
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Cursor in the GeoGebra Script box | Now I will explain the script. |
Highlight the line SetValue[A, A-1] | This line will change the position of the coordinates of A to A-1
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Highlight the line SetValue[B, B+2] | Similarly this command will change the poistion of the coordinates of B to B+2. |
Highlight the line SetColor[j, "Blue"] | This line will set the colour of segment j to blue. |
Highlight the line SetColor[h, "green"] | This line will set the colour of segment h to green. |
Highlight the line SetColor[i, "red"] | This line will set the colour of segment i to red. |
Click on OK button. | Click on the OK button at the bottom. |
Point to the button. | Value button appears in the Graphics view. |
Click on Value button. | Select the Move tool and Click on value button. |
Point to the figure in Graphics view.
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Observe the changes in the Graphics view.
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Click on Zoom Out tool.
Then click in the Graphics veiw. |
Click on Zoom Out tool and click in the Graphics veiw to zoom out. |
Click the value button two more times.
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I will click the Value button again.
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Slide Number 7
Assignment
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As an assignment,
Create a new button. Write a GeoGebra script to change the colour and position of the points A and B. |
Cursor on the interface. | Now we will combine action tools and see what happens. |
Click on File and New Window. | I have opened a new GeoGebra window. |
Click on Slider tool >> click in the Graphics view. | Click on the Slider tool and click in the Graphics view. |
Point to the dialog box. | The Slider dialog box opens. |
Point to Number radio button. | By default, Number radio button is selected with Name as a.
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Type Min as 1>> Max as 10 >> Increment as 1. | We will set the Min value to 1, Max to 10 and Increment to 1. |
Click OK at the bottom.
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Click on OK button at the bottom.
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Click on Regular Polygon tool >>click two points in the Graphics view
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Now click on Regular Polygon tool and click two points in the Graphics view. |
Point to the text box.
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Regular Polygon text box opens.
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Point to Polygon>> poly1 undefined. | Notice in the Algebra view, under Polygon
we have poly1 undefined. |
Drag slider a from 1 to 10. | As a we drag the slider, notice that polygons with different sides appear. |
Cursor in the Graphics view. | Now we will insert an input box. |
Click on Input Box tool >> click in the Graphics view. | Click on Input Box tool and click in the Graphics view. |
Input dailogue box opens. | |
Type Number of sides in Caption text box. | Type the Caption as Number of sides in the box. |
Select a=1 in the Linked Object drop-down >> Click OK button | Select a=1 in the Linked Object drop-down.
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Point to the input box. | Number of sides input box appears in the Graphics view. |
Click on the blue dot against a=1. | In the Algebra view, uncheck the number slider a=1 to hide the slider. |
Type 4 in the input box >> press Enter. | In the Number of sides input box, type 4 and press Enter.
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Type any number between 3 to 10. | Likewise, you can type any number between 3 to 10 and see the respective polygon. |
Slide Number
8 Assignment |
As an assignment,
Create a check box to show and hide the slider and the input box. |
Slide Number
9
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Let us summarise.
In this tutorial we have learnt about free and dependent objects.
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Slide Number 10
About Spoken Tutorial project |
The video at the following link summarizes the Spoken Tutorial project.
Please download and watch it. |
Slide Number 11
Spoken Tutorial workshops |
The Spoken Tutorial Project team conducts workshops and gives certificates.
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Slide Number 12
Forum for specific questions: Do you have questions in THIS Spoken Tutorial?
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Please post your timed queries in this forum. |
Slide Number 13
Acknowledgement |
Spoken Tutorial Project is funded by NMEICT, MHRD, Government of India.
More information on this mission is available at this link. |
This is Madhuri Ganapathi from, IIT Bombay signing off.
Thank you for watching. |