Question

what is the measure, in degrees, of the missing angle in the triangle below? (Angle Q is 39 degrees, angle R is 66 degrees, and angle S is unknown.)

Answer 1

75°

Explanation:

sum of angles of a triangle=180°

∠Q+∠R+∠S=180°

39+66+∠ S=180°

105+∠S=180

∠S=180-105=75 °