Parts of an Isosceles Triangle

From the previous activity DEFINE Isosceles Triangle

Parts of an Isosceles Triangle

Parts of an Isosceles Triangle
In an isosceles triangle, the congruent sides are called LEGS . The third side is called the BASE. The angle between the legs and opposite the base is called the VERTEX ANGLE. The other two angles are called BASE ANGLES.

Name the base angles

Name the vertex angle

Name the legs

Name the base

Drag the vertices of the triangle and observe the angle measures. What do you notice? Write a conjecture