Geogebra- Spoken-Tutorial - Assignments
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 Geogebra tutorial- Relationship between different figures



1.Draw triangle ABC

2.Mark a point D on BC and join AD

3.Draw 3 in-circles one for each triangle ABC, ABD and CBD of radius r, r1 and r2 resp.

4.BE is the height h

5.Verify the relationship between r1,r2 and r which is
(1 -2r1/h)*(1 - 2r2/h) = (1 -2r/h)

6.Move the vertices of triangle ABC