Question

a side of the triangle below has been a extended to form an exterior angle of 159°. find the value of x

Answer 1

x = 69

Explanation:

y + 159 = 180

subtract 159 from both sides.

-159 -159

y=21

Don't forget about the 90 degree angle

x+21+90=180

combine like terms

x + 111 = 180

-111 -111

x = 69

Answer 2

Explanation:

Find the the angle by subtracting 159 from 180 that’s your answer= 21 degrees