63 degrees
Chat with our AI personalities
(180 - 38)/2 = 71 degrees (base angles of an isosceles triangle are congruent).
57.5 degrees
84 degrees
84 degrees
The vertex angle of an isosceles triangle is equal to the measure of each of its base angles. Therefore, if one of the base angles measures 42 degrees, then the vertex angle also measures 42 degrees.