Question

Given the following diagram, find the missing measure.

m 2 = 40°, m 4 = 150°, m 3 =

30
70
110
150

Answer 1

The correct solution is M = 110

Answer 2

m3 = 110°

Explanation:

m1 = 180° - m4 ( sum of angles in a straight angle )

m1 = 180° - 150° = 30°

m3 = 180° - (m2 + m1) ← sum of angles in a triangle

m3 = 180° - (40 + 30 )° = 180° - 70° = 110°