Question

Find the measure of each angle indicated
a. 33
b. 36
c. 31
d. 136

Answer 1

31

Explanation:

A triangle is 180 degrees.

129 + 20 = 149

180 - 49 = 33

Answer 2

31

Explanation:

Let the missing angle be x.

Sum of angles in a triangle is supplementary,

x + 20 + 129 = 180

x + 149 = 180

x = 180 - 149

x = 31