J. Carter GeoGebra 101

GeoGebra 101 Introducing

J. Carter GeoGebra 101

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

GeoGebra

Objectives:1) To learn how to access GeoGebra

at school and at home,2) And to learn how to make a

construction, format it, and produce a worksheet using GeoGebra software.

J. Carter GeoGebra 101

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.

http://www.geogebra.org

J. Carter GeoGebra 101

How to Use GeoGebraAfter opening GeoGebra, a worksheet will

automatically open.

J. Carter GeoGebra 101

How to Use GeoGebra Here are some of GeoGebra’s

features:

J. Carter GeoGebra 101

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

How to Use GeoGebraNext, clear the axes by selecting

View, and Uncheck Axes.

J. Carter GeoGebra 101

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

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

How to Use GeoGebra Your drawing pad should now look like

this:

J. Carter GeoGebra 101

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

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

How to Use GeoGebraYou 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

How to Use GeoGebraYou 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

How to Use GeoGebraYou 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

How to Use GeoGebraYou 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

How to Use GeoGebraYou 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

How to Use GeoGebraYou 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

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

How to Use GeoGebraThings 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.