find the measures of the angles of an isosceles triangle with a vertex angle of 42 degrees Question find the measures of the angles of an isosceles triangle with a vertex angle of 42 degrees in progress 0 Math Kylie 5 days 2021-10-09T22:53:20+00:00 2021-10-09T22:53:20+00:00 1 Answer 0

## Answers ( )

Answer:69°, 69°, and 42°

Step-by-step explanation:Isosceles triangles have three angles — one vertex angle and two base angles.

The

base angles have the same measureand the vertex angle has a different measure.Remember all triangles’ interior angles sum to 180°.If the vertex angle is 42°, then the two base angles combined are:

180° – 42° = 138°Since the base angles are the same,

each base angle is:138° ÷ 2 = 69°Therefore the angles in the triangle measure 69°, 69°, and 42°.