Question

The vertex angle of an isosceles triangle measures 40°. What is the measure of a base angle?

Answer 1

An isosceles has 2 same angle measures (base) and one vertext

180 - 40 = 140

Both angles of the base combined is 140

Divide by 2

140/2 = 70

The measure of one angle of the base is 70

Answer 2

Answer:

B) 70°

Step-by-step explanation: