Question

What is the meaning of the vertex angle is twice either base angle?

Answer 1

Vertex angle is angle between the two sides.

Base angles are angles that rest on the base.

If one base angle is supposed x

Both the base angles are 2x

Hence base angles are 2x

And vertex angle is 2×2x= 4x

Answer 2

Answer:

vertex angle is defined as the angle between two angles