Question

Find the value of x.

Give your answer in degrees.

(hint: form an equation, then solve it to find x)

Answer 1

Answer:x=8

Explanation:

The interior angles of a triangle add up to 180 so

2x+39 + 2x+70 + x+31 = 180

2x + 2x +x=180-39-70-31

5x= 40

x=40/5

x=8

x+31 is in there because one of the int angles of the triangles is congruent with the angle of x+31