Difference between revisions of "GeoGebra-5.04/C3/Create-action-object-Tools/English-timed"
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'''Ubuntu Linux OS''' version 16.04 | '''Ubuntu Linux OS''' version 16.04 | ||
| − | '''GeoGebra''' version 5. | + | '''GeoGebra''' version 5.0.438.0-d |
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Latest revision as of 15:39, 10 October 2019
| Time | Narration |
| 00:01 | Welcome to the Spoken Tutorial on Create Action Object Tools in GeoGebra. |
| 00:07 | In this tutorial we will learn about free and dependent Objects. |
| 00:14 | We will also learn to,
Create a check-box Create an insert button Insert an input box |
| 00:23 | To record this tutorial, I am using;
Ubuntu Linux OS version 16.04 GeoGebra version 5.0.438.0-d |
| 00:36 | To follow this tutorial, learner should be familiar with GeoGebra interface. For the prerequisite GeoGebra tutorials, please visit this site. |
| 00:47 | In this tutorial we will use tangents to a circle tool created in the previous tutorial. |
| 00:54 | To practise this tutorial you need to download the zip file given in the Code files link. |
| 01:00 | Extract the downloaded zip file.Locate tangents-circle.ggt file in the extracted folder. |
| 01:10 | I have already downloaded and extracted the file to my Desktop. |
| 01:15 | I will right-click on it and Open With GeoGebra. |
| 01:20 | Click on Tangents to a circle tool and click two points in the Graphics view. |
| 01:28 | Tangents to a circle are drawn in the Graphics view. |
| 01:32 | Now I will explain about Free and Dependent Objects. |
| 01:37 | Let us complete the figure. |
| 01:40 | Click on the Intersect tool. Mark points of intersection of the tangents to the circle. |
| 01:49 | Using the Segment tool we will join A C, A D and A B. |
| 02:00 | In the Algebra view, note that segment AC is equal to segment AD.
They are radii of the circle c. |
| 02:09 | Now let's measure the angles at the point of contact of the tangents to the circle. |
| 02:15 | Click on the Angle tool and click on the points B, C, A. and then click on the points A, D, B. |
| 02:32 | Observe that the angles alpha and beta are 90 degrees. |
| 02:37 | This is because at the point of contact, tangent to a circle is perpendicular to the radius. |
| 02:44 | In the Algebra view, click on the arrow triangle named as Toggle Style Bar. |
| 02:50 | Auxillary Objects, Sort Objects by drop-down and fx drop-down appear. |
| 02:58 | Click on Sort Objects by drop-down.Sort by menu opens. |
| 03:05 | This menu has, Dependency, Object Type, Layer and Construction Order check-boxes. |
| 03:15 | By default, Object Type check-box is selected. |
| 03:19 | In other operating systems a different check-box may be selected. |
| 03:24 | Let us select Dependency check-box. |
| 03:28 | Note that only points A and B are under Free Objects. All other objects are under Dependent Objects. |
| 03:38 | You can select other check-boxes and see how the objects are sorted. |
| 03:45 | Now we will learn how to create a check-box. |
| 03:49 | Click on the Check Box tool and click in the Graphics view. |
| 03:56 | Check Box to Show/hide Objects dialog box opens. |
| 04:00 | In the Caption text box, I will type Angles. |
| 04:04 | From the Select objects drop-down, let us select Angle alpha and Angle beta. |
| 04:12 | Then click on Apply button in the box. |
| 04:16 | Angles check-box appears in the Graphics view. |
| 04:20 | Let us click on Move tool to avoid clicking of other objects in the Graphics view. |
| 04:27 | Angles check-box is shown as a Boolean Value a in the views. |
| 04:33 | Using this check-box, we can show or hide the angles alpha and beta. |
| 04:39 | In the Algebra view, Boolean Value is true when the angles are shown. |
| 04:44 | Boolean Value becomes false when they are hidden. |
| 04:49 | Now we will insert an input box. |
| 04:51 | Click on the Input Box tool and click in the Graphics view. |
| 04:59 | Input Box appears in the Graphics view. |
| 05:02 | In the box, type the Caption as Circle. |
| 05:06 | In the Linked Object drop-down, select circle c. And click on OK button in the box. |
| 05:14 | Circle input box, along with its coordinates, appears in the Graphics view. |
| 05:20 | Click on Move tool to select it. |
| 05:23 | In the input box, type B in place of A and press Enter. |
| 05:29 | The tangents, angles and all related objects disappear. |
| 05:34 | Position of the circle has also changed |
| 05:38 | This happens because all the objects are dependent on point A. |
| 05:44 | As an assignment,
In the circle input box change (A,B) to (B,A) and (A,A) and see what happens. Explain your observation. |
| 05:57 | Click on Undo button to undo the changes |
| 06:01 | Now, we will learn how to create a button. |
| 06:04 | Click on the Button tool and click in the Graphics view. |
| 06:10 | The Button dialog box opens. |
| 06:13 | Type Caption as Value. |
| 06:16 | In GeoGebra Script box type the following script. |
| 06:20 | Now I will explain the script. |
| 06:23 | This line will change the position of the coordinates of A to A-1
This means that the x coordinate of A becomes x-1 and y coordinate of A becomes y-l. |
| 06:37 | Similarly this line will change the poistion of the coordinates of B to B+2. |
| 06:43 | This line will set the colour of segment j to blue. |
| 06:47 | This line will set the colour of segment h to green. |
| 06:51 | This line will set the colour of segment i to red. |
| 06:55 | Click on the OK button at the bottom. |
| 06:58 | Value button appears in the Graphics view. |
| 07:02 | Select the Move tool and Click on value button. |
| 07:08 | Observe the changes in the Graphics view. |
| 07:11 | Observe that the coordinates of point A and point B have changed. |
| 07:16 | The colours of the segments have changed accordingly. |
| 07:20 | Click on Zoom Out tool and click in the Graphics veiw to zoom out. |
| 07:26 | I will click the Value button again.
Observe the changes in the coordinates of points A and B. |
| 07:35 | As an assignment,
Create a new button. Write a GeoGebra script to change the colour and position of the points A and B. |
| 07:46 | Now we will combine action tools and see what happens. |
| 07:51 | I have opened a new GeoGebra window. |
| 07:55 | Click on the Slider tool and click in the Graphics view. |
| 08:01 | The Slider dialog box opens. |
| 08:04 | By default, Number radio button is selected with Name as a.
We will leave it as it is. |
| 08:13 | We will set the Min value to 1, Max to 10 and Increment to 1. |
| 08:21 | Click on OK button at the bottom. A number slider a appears in the Graphics view. |
| 08:28 | Now click on Regular Polygon tool and click two points in the Graphics view. |
| 08:36 | Regular Polygon text box opens. In the Vertices text box, type a and click OK in the box. |
| 08:46 | Notice in the Algebra view, under Polygon we have poly1 undefined. |
| 08:52 | As a we drag the slider, notice that polygons with different sides appear. |
| 09:05 | Now we will insert an input box. |
| 09:08 | Click on Input Box tool and click in the Graphics view. |
| 09:15 | Input dailog box opens. |
| 09:18 | Type the Caption as Number of sides in the box. |
| 09:22 | Select a=1 in the Linked Object drop-down. Click on OK button in the text box. |
| 09:30 | Number of sides input box appears in the Graphics view. |
| 09:35 | In the Algebra view, uncheck the number slider a=1 to hide the slider. |
| 09:41 | In the Number of sides input box, type 4 and press Enter. You will see a square. |
| 09:50 | Likewise, you can type any number between 3 to 10 and see the respective polygon. |
| 09:57 | As an assignment,
Create a check box to show and hide the slider and the input box. |
| 10:04 | Let us summarise.
In this tutorial we have learnt about free and dependent objects. |
| 10:12 | We have also learnt to,
Create a check-box Create an insert button Insert an input box |
| 10:22 | The video at the following link summarizes the Spoken Tutorial project. Please download and watch it. |
| 10:30 | The Spoken Tutorial Project team conducts workshops and gives certificates. For more details, please write to us. |
| 10:38 | Please post your timed queries in this forum. |
| 10:42 | Spoken Tutorial Project is funded by NMEICT, MHRD, Government of India. More information on this mission is available at this link. |
| 10:54 | This is Madhuri Ganapathi from, IIT Bombay signing off. Thank you for watching. |
