Question

The angle at the vertex of an isosceles triangle is 4 times its base angles the angle at the vertex is?

Answer 1

Answer:

Step-by-step explanation:let base angle be x

Therefore vertex angle =4x

x+x+4x=180

6x=180

x=30

Vertex angle =120

Answer 2

Answer:

x+x+4x=180 degree

6x=180 degree

x=30 vetex angle =4x=120 degree

Step-by-step explanation:

vertex 120 degree