Question

Find the measure of ∠ 1
a 180°
b 30°
c 60°
d 120°

Answer 1

120

Explanation:

Using the theorems of geometry, you know that all angles of a triangle add up to 180º. We can use an equation after looking at both angles, and the total:

30 + 30 + x = 180

60 + x = 180

x = 180 - 60

x = 120