Question

What is the value of x in the figure below?

70°
xo
115°
A 45°
B. 550
C. 57.59
D. 22.50

Answer 1

A. 45°

Explanation:

By exterior angle theorem:

x + 70° = 115°

x = 115° - 70°

x = 45°

Answer 2

x= 45°

Explanation:

triangles degrees all together are always 180°

x≠180°

a straight line is also 180°

180°-115°= 65°

70°+65°= 135°

180°-135°= 45°