1. GeoGebra 101
Introducing
J. Carter
GeoGebra 101

2. GeoGebra: What is it?
GeoGebra is a free educational mathematics software that joins dynamic geometry, algebra and calculus.
It will help you do constructions including points, segments, lines, polygons, conic sections, and functions.
J. Carter
GeoGebra 101

3. GeoGebra
Objectives:
To learn how to access GeoGebra at school and at home,
And to learn how to make a construction, format it, and produce a worksheet using GeoGebra software.
J. Carter
GeoGebra 101

4. Where is GeoGebra? GeoGebra is web-based or can be downloaded from
In our classroom, we will use the downloaded version as follows:
1) Sign out as Student,
2) Sign on as GeoGebra,
3) Password: Carter 850,
4) Click on icon on desktop to open.
J. Carter
GeoGebra 101

5. How to Use GeoGebra
After opening GeoGebra, a worksheet will automatically open.
J. Carter
GeoGebra 101

6. How to Use GeoGebra Here are some of GeoGebra’s features: J. Carter

7. How to Use GeoGebra
Here’s how to get started with your own drawing. To construct a triangle:
First, close the algebra window by clicking on the X.
J. Carter
GeoGebra 101

8. How to Use GeoGebra
Next, clear the axes by selecting View, and Uncheck Axes.
J. Carter
GeoGebra 101

9. How to Use GeoGebra Your drawing pad should now be clear.
Next, add a point by clicking on the point tool which is on the tool bar.
J. Carter
GeoGebra 101

10. How to Use GeoGebra Add 2 more points by clicking on the point tool.
Connect the points using the line segment tool which is found under the line tool. Click on a point then the next point counterclockwise.
Finally, use the polygon tool to create the triangle by clicking on the points (vertices).
J. Carter
GeoGebra 101

11. How to Use GeoGebra Your drawing pad should now look like this:
J. Carter
GeoGebra 101

12. How to Use GeoGebra
You can label the vertices and sides of your triangle by changing the properties.
“Apple, click” inside the triangle to access the Properties menu. Click on Properties.
J. Carter
GeoGebra 101

13. How to Use GeoGebra
The following Properties menu opens. From here, you can add labels, change colors, and change the thickness of line segments.
J. Carter
GeoGebra 101

14. How to Use GeoGebra You can label the vertices:
Select Objects: Points A,B,C.
Check Show label: Name. Hit Apply.
Labels can be moved by dragging letters.
J. Carter
GeoGebra 101

15. How to Use GeoGebra You can label the sides:
Select Objects: Segment a, Segment b, Segment c.
Check Show label: Name & Value. Hit Apply.
Labels can be moved by dragging letters or numbers.
J. Carter
GeoGebra 101

16. How to Use GeoGebra You can label the area of the triangle:
From the Properties menu:
Select Objects: Triangle poly1.
Check Show label: Value. Hit Apply.
J. Carter
GeoGebra 101

17. How to Use GeoGebra You can change the colour of your triangle:
From the Properties menu: Check: Show object: Click on colour tab. Select your colour. Hit apply.
J. Carter
GeoGebra 101

18. How to Use GeoGebra You can change the colour of the drawing pad:
“Apple click” on the drawing pad. Select Properties. Select colour. Choose your colour. Hit apply.
J. Carter
GeoGebra 101

19. How to Use GeoGebra You can add titles to your construction:
Select the text tool from the tool bar.
Click anywhere on the drawing pad. In the text box, type your text. Text box can be moved later.
J. Carter
GeoGebra 101

20. How to Use GeoGebra Now please,
Add text boxes to display the Perimeter and Area formulas of a triangle.
Next, calculate the perimeter of your triangle and record it in a text box.
Finally, explore tool bar to find “Reflection tool” and reflect triangle over a line.
J. Carter
GeoGebra 101

21. How to Use GeoGebra Things to remember: Use Undo to go back a step.
Position cursor on Move mode when not making a selection.
“File, Save as” will save your file.
“File, Export, Dynamic worksheet as webpage” will create a worksheet.
“File, Export, Drawing Pad as Picture” will save your file as a picture.
J. Carter
GeoGebra 101