Question

In a certain triangle, one angle has a measure of 30° and another angle has a measure of 120°. If the triangle is isosceles, then which of the following could be the measure of the third angle?
A. 120°
B. 60°
C. 30°
D. 75°

Answer 1

The answer is C because an isosceles triangle got up to 180 degrees and 120 + 30 is 150 and 150 + 30 is 180 so therefore your answer is C