find the measure of the angles in an isosceles triangle if angles the ratio of the base angle to the vertex angle is 1:3

Question

Need help please. Thank you

Answer 1

The base angles of an isosceles triangle are congruent.

The three angles are in the ratio of 1 : 1 : 3. 

180° is divided into 5 parts. Each part is 36°.

One part goes to each of the base angles, and three parts, 108°, goes to the vertex.