Parts of an Isosceles Triangle
From the previous activity DEFINE 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