The measure of one of the exterior angles of a triangle is twice one of the interior opposite angles and the measure of the other interior opposite angles is 60°. The triangle is a/an:

A. right angle triangle

B. scalene triangle

C. isosceles triangle

D. equilateral triangle

Answer: Option D

Solution (By Examveda Team)

2x = x + 60°
x = 60°
This triangle is a equilateral triangle.