Question

Two angles in a triangle have measures of 20' and 50'

What is the measure of the third angle?
A. 30°
B. 110°
C. 70°
D. 120°

Answer 1

The sum of all angles (3 angle)= 180

unknown angle = x

x +20+50 =180

x +70 =180

x = 180-70

x=110

Ans ; the third angle is 110 degree

Explanation: