Question

I need help with this please

Answer 1

x=21 interior angle =150 exterior angle=210

Explanation:

to find the angle rule=(n-2)×180

n is the number of sides in the polygon

(12-2)×180=1800

1800/12=150 (this is the interior angle)

7x+3=150

x=21

exterior angle = 360-150=210