Question

plz answer to this que.

Answer 1

answer is 8 .
exterior angle = 180-135=45 degree
so no.of sides = 360/45
8 sides

Answer 2

135 = {180(n-2)}/n
135n = 180n - 360
360 = 180n - 135n
360 = 45n
360/45 = n
n = 8

Therefore regular octagon have each of it's interior angle 135°