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Interior angle for regular polygon = (n-2)x 180/n
(n-2)x 180/n= 135
180n-360=135n
45n = 360
n = 8
Number of side = 8
Hope this helps
(n-2)x 180/n= 135
180n-360=135n
45n = 360
n = 8
Number of side = 8
Hope this helps