Geogebra- Spoken-Tutorial - Assignments
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 Geogebra tutorial- Angles and triangles Basics



1.Draw to verify ­ Exterior Angle of a Triangle is equal to the 

2.sum of the opposite Interior Angles

3.Draw a triangle using the 'Polygon' tool

4. Extend any one of the sides using the 'Line through two points' tool

5. Use 'Angle' tool to measure the exterior angle and the opposite interior angles 

6. Use 'Insert Text' tool to display the results

7. Verify this by using the 'Move' tool and moving the free objects