| Slide Number 1
|Welcome to the Spoken Tutorial on Create Action Object Tools in GeoGebra.|
| Slide Number 2
| In this tutorial we will learn about free and dependent Objects.
| Slide Number 3
| To record this tutorial, I am using;
| Slide Number 4
| To follow this tutorial, learner should be familiar with GeoGebra interface.
|In this tutorial we will use tangents to a circle tool created in the previous tutorial.|
| Slide Number 5
| To practise this tutorial you need to download the zip file given in the Code files link.
| Point to the file on the Desktop.
|| I have already downloaded and extracted the file to my Desktop.
| Click on Tangents to a circle tool >> click two points in the Graphics view.
|| Click on Tangents to a circle tool and click two points in the Graphics view.
|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.
|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.
|| Click on the Angle tool and click on the points B, C, A.
|Point to the angles.|| Observe that the angles alpha and beta are 90 degrees.
| 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.
|Point to the check-boxes.|| This menu has,
Dependency, Object Type, Layer and Construction Order check-boxes.
| Point to Object Type check-box.
|| By default, Object Type check-box is selected.
| Under Free Objects point to points A and B.
|| Note that only points A and B are under Free Objects.
|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.
| Point to the Caption text box.
|In the Caption text box, I will type Angles.|
| Point to Select objects in construction or choose from list.
|| From the Select objects drop-down, let us select Angle alpha and Angle beta.
|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.
|| In the input box, type B in place of A and press Enter.
|Slide Number 6
| 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,
| In GeoGebra Script box type the following script.
|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
|Highlight the line SetValue[B, B+2]||Similarly this line 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.
|| Observe the changes in the Graphics view.
| 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.
|| I will click the Value button again.
| Slide Number 7
| 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.
|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.
|| Click on OK button at the bottom.
| Click on Regular Polygon tool >>click two points in the Graphics view
|Now click on Regular Polygon tool and click two points in the Graphics view.|
| Point to the text box.
|| Regular Polygon text box opens.
|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 dailog 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.
|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.
|Type any number between 3 to 10.||Likewise, you can type any number between 3 to 10 and see the respective polygon.|
| Slide Number
| As an assignment,
Create a check box to show and hide the slider and the input box.
| Slide Number 9
|| Let us summarise.
In this tutorial we have learnt about free and dependent objects.
| 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.
| Slide Number 12
Forum for specific questions:
Do you have questions in THIS Spoken Tutorial?
|Please post your timed queries in this forum.|
| Slide Number 13
| 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.