Question

An isosceles triangle includes two angles that measure 60' which equation can be used to find the measure of the third angle

A. X=180-60

B. X=180x60

C. X=180-2(60)

D. X=180+2(60)

Answer 1

The answer is C. since a triangle has to have a total of 180 degrees, you have to add both of the degrees of both the angles. 60 + 60= 120.
180-120=60
Your last angle is 60 degrees.