Question

A triangle has angle measurements of 66°, 66°, and 48°. Is this triangle isosceles?

Answer 1

yes

Explanation:

The 2 base angles of an isosceles triangle are congruent.

66° + 66° + 48° = 180° ( sum of angles in a triangle )

Thus the triangle is isosceles with base angles = 66° and vertex = 48°