Isoceles Triangle Theorems
Define: Isosceles Triangle
![Image](https://stage.geogebra.org/resource/KV6mGU5X/XcBpsQexLmS70XZV/material-KV6mGU5X.png)
Name the base angles.
Name the vertex angle
Name the legs
Name the base
Drag the vertices of the triangle and observe the angle measurements. What do you notice? Write a conjecture about the base angles of an isosceles triangle.
Drag a vertex of the triangle until two of the angles are congruent. What do you notice about the sides of the triangle? Write a conjecture about the congruent angles and the sides opposite them.
Drag a vertex of the traingle. What do you notice about segments CD and DB?
What can you conclude that segment AD does to segment CB?
What type of angles are and ?
Write a conjecture that summarizes your findings about the angle bisector, segment AD, of the vertex angle in an isosceles triangle and its base, segment CB.