Introducing

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GeoGebra 101

• Introducing

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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.

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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.

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Where is GeoGebra?

• GeoGebra is web-based or can be downloaded from
• In our classroom, we will use the downloaded
  version as follows
• Click on icon on desktop to open.

http//www.geogebra.org
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How to Use GeoGebra

• After opening GeoGebra, a worksheet will
  automatically open.

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How to Use GeoGebra

• Here are some of GeoGebras features

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How to Use GeoGebra

• Heres how to get started with your own drawing.
  To construct a triangle
• First, close the algebra window by clicking on
  the X.

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How to Use GeoGebra

• Next, clear the axes by selecting View, and
  Uncheck Axes.

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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.

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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).

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How to Use GeoGebra

• Your drawing pad should now look like this

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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.

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How to Use GeoGebra

• The following Properties menu opens. From here,
  you can add labels, change colors, and change the
  thickness of line segments.

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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.

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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.

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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.

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How to Use GeoGebra

• You can change the color of your triangle
• From the Properties menu Check Show object
  Click on color tab. Select your color. Hit
  apply.

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How to Use GeoGebra

• You can change the color of the drawing pad
• Apple click on the drawing pad. Select
  Properties. Select color. Choose your color.
  Hit apply.

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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.

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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.

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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.