Investigating Geometry: Polygons

Henrico County Public Schools

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May 2006

Lesson 3-2: Isosceles Triangles

Interactive Applet
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Objective:

The student will be able to apply the Isosceles Triangle Theorem in determining angle and side measurements.

 Applet Directions 1 Close 
  1. This is a diagram of three isosceles triangles where: AC=BC (red) , DC=DE (green) , EF=EG (blue)

  2. Given the measure of ∠A, determine the measure of ∠G.
 Applet Directions 2 Close 
  1. If points A, B or F are moved, how does this change ∠G?

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  1. Glencoe: On Line Quiz
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Create Isosceles Triangle
Right Triangle
Construct Isosceles Triangle C.a.R.