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4.3 Isosceles Triangle

  1. Create an isosceles triangle.
  2. Show the measures of the two congruent legs and congruent base angles of the triangle.
  3. Drag the vertices of your triangle to make sure that it remains an isosceles triangle.
  4. Create the angle bisector of the vertex angle of the triangle.
  5. Use measurement if you need to in order to answer the questions below the geogebra box.

Question 1

At what angle does the angle bisector hit the opposite side of the vertex angle?

Question 2

What does the angle bisector do the length of the opposite side of the vertex angle?