Question

Help me please thank you

Answer 1

The smaller numbers are a bit blurry, but I'm assuming angle 1 is the top-most angle and angle 4 is the corresponding angle to angle 1.

If so, then

angle 1 = angle 4

3x-160 = x+20

3x-x = 20+160

2x = 180

x = 180/2

x = 90 is the answer