An isosceles triangle has congruent base angles, so if one of the base angles measure 54 degrees, then the other base angle does, too. And a triangle measures up to 180 degrees. 180 = x + 2(54) 180 = x + 108 x = 72 So the answer is B) 72
An isosceles triangle has same base angles if one of the base angles measure 54 degrees, 2nd is also 54 And a triangle measures up to 180 degrees. 180 = x + 2(54) 180 = x + 108 x = 72 B) 72 is right option hope this helps
