View source for GeoGebra-5.04/C2/Introduction-to-GeoGebra/English-timed

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||'''Time''' 
||'''Narration''' 

|- 
|| 00:01
|| Welcome to this tutorial on '''Introduction to GeoGebra'''. 

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|| 00:05
|| In this tutorial, we will learn, About '''GeoGebra''' interface and geometric tools 

|- 
|| 00:12
||  To draw parallel and perpendicular lines 

|- 
|| 00:16
||  To change object properties of a line 

About properties of '''Graphics view'''. 

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|| 00:22
|| Here I am using, '''Ubuntu Linux OS''', version 14.04 

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|| 00:28
|| '''GeoGebra '''version 5.0.438.0-d 

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|| 00:33
|| To follow this tutorial, learner should be familiar with basic Mathematics. 

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|| 00:40
|| To open '''GeoGebra''' applicaton in '''Ubuntu Linux OS''', click on '''Dash Home'''. 

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|| 00:46
|| In the '''search bar''' type '''geogebra'''. 

'''GeoGebra''' icon appears. 

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|| 00:52
|| Double-click on the icon to open the '''GeoGebra''' application. 

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|| 00:57
|| Let us open GeoGebra application in '''Windows 10 OS'''. 

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|| 01:04
|| In  '''Search the web and Windows''' box, type '''geogebra'''. 

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|| 01:09
|| '''GeoGebra '''appears in the list. 

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|| 01:12
|| Click on it to open the '''GeoGebra '''application. 

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|| 01:17
|| This is the '''GeoGebra '''interface. 

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|| 01:20
|| It has a standard '''menu bar''' with menu items, 

'''File''', '''Edit''', '''View''', '''Options''', '''Tools''', '''Window''' and '''Help'''. 

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|| 01:37
|| Below the '''menu bar''', is a '''tool bar''' with various geometric tools. 

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|| 01:43
|| On the right side of the '''tool bar''', we have '''Undo''', '''Redo''', '''Help''' and '''Preferences''' options. 

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|| 01:53
|| Below  '''tool bar''' we have '''Algebra view''' and '''Graphics view'''. 

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|| 01:58
|| In '''GeoGebra''', geometry and algebra work side by side. 

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|| 02:03
|| '''Graphics''' view is used to create geometric figures using tools on the '''toolbar'''. 

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|| 02:09
|| '''Algebra''' view displays the corresponding algebraic expressions of the drawn figures. 

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||02:15
|| Using '''View''' menu, we can open or close any view based on our requirement. 

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|| 02:25
|| At the bottom of the window, we have an '''input bar'''. 

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|| 02:29
|| We can directly enter algebraic commands and functions using the '''input bar.''' 

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|| 02:36
|| By default '''grid''' and '''axes''' options are enabled on the '''Graphics view'''. 

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|| 02:42
|| You can disable the '''axes''' or '''grid''' using the context menu. 

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|| 02:47
|| Right click on '''Graphics''' view. 

The '''Graphics''' menu opens. 

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|| 02:53
|| In this menu, we have options to check and uncheck '''Axes''' and '''Grid'''. 

|- 
|| 03:00
|| Let me show you another method to enable or disable the '''axes''' and '''grid'''. 

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|| 03:05
|| Notice a small arrow triangle next to '''Graphics''', named as '''Toggle Style Bar.''' 

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|| 03:12
|| Click on the arrow triangle to open the drop-down menu. 

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|| 03:16
|| Here you will see options to check and uncheck  '''axes''' and '''grid'''. 

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|| 03:22
|| Next we will learn about the '''tool bar ''' in detail. 

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|| 03:26
|| Let us click on '''Move Graphics View''' tool at the right end of the '''toolbar'''. 

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|| 03:31
|| Notice that, a dark blue border appears around the tool. 

This indicates that the tool is selected. 
 
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|| 03:38
|| Hover the cursor on the tool. 

Its name and function appears in the tool tip box. 

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|| 03:45
|| Using this selected tool, we can move the '''Graphics view'''. 

Click and drag the '''Graphics view''' as required. 

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|| 03:53
|| Each tool has a small black triangle at its corner. 

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|| 03:58
|| When the cursor is placed on the triangle, it turns red. 

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|| 04:03
|| Let us click on '''Move '''tool on  the '''tool bar.''' 

A drop-down list of related tools appear. 

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|| 04:10
|| Let us draw points in the '''Graphics view'''. 

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|| 04:13
|| Click on '''Point''' tool and then click on the '''Graphics view''' 

Point '''A''' is drawn. 

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|| 04:20
|| Again click to draw another point '''B'''. 

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|| 04:24
|| Note that the corresponding coordinates of the points appear in the '''Algebra view'''. 

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|| 04:29
|| Let us learn to draw a line. Click on the triangle at the corner of '''Line''' tool. 

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|| 04:36
|| Here you can see a list of '''Line''' tools to draw various types of lines. 

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|| 04:42
|| Using '''Line''' tool, we will draw a line through points A and B. 

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|| 04:47
|| Click on''' Line''' tool and click on points '''A''' and''' B.''' 

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|| 04:53
|| Line '''f''' passes through '''A '''and '''B'''. 

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|| 04:57
|| Let us delete all the '''objects''' on the '''Graphics view'''. 

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|| 05:01
|| Press '''Ctrl+A''' to select all the objects. 

Press '''Delete key '''on the keyboard. 

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|| 05:08
|| Let us redraw the line '''AB'''. 

Click on''' Line''' tool and click on the '''Graphics view'''. 

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|| 05:17
|| Click again at a different place to draw the line '''AB'''. 

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|| 05:22
|| Next I will draw a line perpendicular to line '''AB'''. 

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|| 05:27
|| To do that, click on the '''Perpendicular Line''' tool. 

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|| 05:31
|| Click above line '''AB''' to draw point '''C''', then click on line '''AB'''. 

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|| 05:38
|| Line '''g''' passing through '''C''' is perpendicular to line '''AB''' . 

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|| 05:43
|| Let us draw a line parallel to line '''AB'''. 

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|| 05:47
|| Click on '''Parallel Line''' tool. 

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|| 05:50
|| Click below '''AB''' to draw point ''' D''', then click on line '''AB'''. 

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|| 05:57
|| A line '''h''', parallel to '''AB''' and passing through point '''D''', is drawn. 

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||06:02
|| Now we will mark intersection points for the two lines. 

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|| 06:06
|| In the '''Point''' tool drop-down, select '''Intersect''' tool. 

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|| 06:10
|| Click on the intersection point of the lines '''f''' and  '''g'''. 

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|| 06:15
|| Then click on the intersection point of the lines '''g''' and '''h'''. 

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|| 06:20
|| Now we will make our drawing a bit interactive. 

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|| 06:24
|| Click on '''Move''' tool. 

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|| 06:27
|| Click on point '''A''' and drag. 

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|| 06:30
|| Notice that points E and F and all lines move along with point '''A'''.  

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|| 06:36
|| Similarly we will move points '''B''' and '''D'''. 

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|| 06:40
|| Points '''E , F''' and the lines move along with point '''B'''. 

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|| 06:45
|| Only point '''F''' and line '''h''' move along with point '''D. ''' 

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||06:50
||Points '''A, B and D''' are independent objects. 

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|| 06:56
|| Now I will try to move points '''E''' or '''F.''' 

We do not see any movement. 

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|| 07:03
|| This indicates that, points '''E''' or '''F''' are dependent objects. 

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|| 07:09
|| Now let us change the properties of the lines. 

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|| 07:13
|| Right click on line '''AB'''. 

A context menu opens, with all the properties of the line. 

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|| 07:21
|| Select '''Object Properties'''. 

'''Preferences''' window opens. 

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||07:27
|| Resize the '''Preferences''' window to see the changes on the '''Graphics '''view. 

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|| 07:33
|| I will explain some basic properties in the '''Preferences''' window. 

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|| 07:38
|| In the '''Name''' box, you can change the name to '''Line AB'''. 

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|| 07:43
|| And the '''Caption''' as '''Original Line.''' 

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|| 07:46
|| Click the '''Show Object''' check box, to show or unshow the line. 

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|| 07:51
|| The '''Show Label''' check box has a drop down to choose. 

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|| 07:55
|| I will choose '''Name & Value'''. 

Notice that name and value appears below the line. 

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|| 08:03
|| Next click on the '''Color ''' tab. 

Here we have a color box to colour the line. 

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|| 08:10
|| Below the colour box there is '''Preview''' box to view the changed colour. 

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|| 08:15
|| I will click on the green box. 

The colour of '''Line AB''' has changed to green. 

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|| 08:22
|| Next click on '''Style''' tab. 

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|| 08:25
|| Here you can change, '''Line Thickness''' 

'''Line Opacity''' and '''Line Style'''. 

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||  08:33
|| Close the '''Preferences''' window. 

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|| 08:36
|| Observe the '''Line AB''' with changed object properties. 

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|| 08:41
|| I will change the '''object properties''' of line '''h'''. 

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|| 08:45
|| Right-click on line '''h''', to select '''Object Properties'''. 

'''Preferences '''window opens. 

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|| 08:53
|| Here I will change the colour to pink and style to '''dashed line'''. 

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|| 09:00
|| Close the '''Preferences''' window. 

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|| 09:03
|| Now let us save the file. 

Click on '''File''' menu and select '''Save'''. 

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|| 09:10
|| '''Save''' dialog box opens. 

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|| 09:13
|| I will select '''Documents''' folder on my machine. 

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|| 09:17
|| You can select any folder of your choice on your machine. 

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|| 09:22
|| Type the '''File name''' as '''Lines'''. 

Then click on '''Save''' button at the bottom. 
 
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|| 09:29
|| Our file is saved with '''.ggb''' extension. 

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|| 09:34
|| Pause the tutorial and do this assignment. 

Open a new '''GeoGebra''' window. 

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|| 09:40
|| Draw a line segment '''AB''' using '''Segment''' tool 


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|| 09:44
||  Draw a perpendicular bisector to segment '''AB'''. 

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|| 09:48
||  Rename the lines and change the object properties. 

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|| 09:52
|| Your completed assignment should look like this. 

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|| 09:57
|| Let's now open a new window. 

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|| 10:00
|| Click on '''File menu''' and select '''New Window'''. 

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|| 10:05
|| Now, I will explain about '''Graphics''' window properties. 

Here I will close the '''Algebra''' view. 

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|| 10:13
|| Right click on the '''Graphics''' window. 

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|| 10:16
|| The context menu opens with various options. 

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|| 10:20
|| Choose '''Graphics''' option. 

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|| 10:23
||  '''Preferences''' window opens. 

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|| 10:26
|| In the '''Preferences''' window, we will see '''Basic''', '''xAxis''', '''yAxis''' and '''Grid''' tabs. 

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|| 10:36
|| Resize the '''Preferences''' window and '''Graphics''' view and place them side by side. 

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|| 10:43
|| We will change the basic properties of the '''Axes''' in the '''Basic''' tab. 

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|| 10:48
|| Click on '''Bold''' check-box. 

This makes the '''Axes''' bold. 

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|| 10:54
|| Click on '''Color''' button. 

'''Choose a color''' box appears. 

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|| 11:00
|| You can choose any dark colour and click '''OK''' button. 

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|| 11:05
|| The colour of the '''axes''' changes accordingly. 

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|| 11:09
|| Next, select '''Line style''' drop down. 

I will select two-sided arrow option. 

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|| 11:17
|| Now we will move on to '''Miscellaneous''' properties. 

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|| 11:21
|| Let us change the background colour of the '''Graphics view'''. 

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|| 11:25
|| Click on ''' Background Color''' button. 
 
'''Choose a color''' box appears. 

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|| 11:31
|| I will select light green and click '''OK''' button. 

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|| 11:36
|| Observe that the background colour changes to light green. 

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|| 11:40
|| Now click on '''Grid''' tab. 

By default, '''Show Grid''' check-box is checked. 

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|| 11:47
|| Let us change the colour of the '''Grid'''. 

Click on '''Color''' button. 

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|| 11:53
|| '''Choose a color''' box appears. 

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||11:56
|| I will select '''Dark Green''' and click '''OK''' button. 

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|| 12:02
|| Observe that the colour of the '''grid''' changes to dark green. 

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|| 12:07
|| Close the '''Preferences '''window. 

|- 
|| 12:10
|| Observe the '''GeoGebra''' interface with changed properties. 

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|| 12:15
|| As an assignment explore, 

1. '''Grid Type '''options 

2. '''xAxis''' and '''yAxis''' tabs 

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|| 12:25
|| Let us summarise what we have learnt. 

|- 
||12:28
|| In this tutorial, we have learnt,  About GeoGebra interface and geometric tools 

|- 
|| 12:35
||  To draw parallel and perpendicular lines 

To change object properties of a line 

|- 
|| 12:41
||  About properties of Graphics view 

|- 
|| 12:44
|| The video at the following link summarises the Spoken Tutorial project. 

Please download and watch it. 

|- 
|| 12:52
|| The '''Spoken Tutorial Project '''team conducts workshops and gives certificates. 

For more details, please write to us. 

|- 
|| 13:01
|| Do you have questions in THIS Spoken Tutorial? 

Please visit this site 

|- 
|| 13:07
|| Choose the minute and second where you have the question 

Explain your question briefly 

|- 
|| 13:14
|| Someone from our team will answer them 

|- 
|| 13:18
|| The Spoken Tutorial forum is for specific questions on this tutorial 

|- 
|| 13:23
||  Please do not post unrelated and general questions on them 

This will help reduce the clutter 

|- 
|| 13:31
||  With less clutter, we can use these discussion as instructional material 

|- 
|| 13:36
|| Spoken Tutorial Project is funded by NMEICT, MHRD, Government of India. 
 
More information on this mission is available at this link. 

|- 
|| 13:47
|| This is Madhuri Ganapathi from, IIT Bombay signing off. 

Thank you for watching. 
|- 

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