The interior angles of a convex polygon are in Ap.The smallest angle is 120 and the common difference is 5.Then find numbers of side of polygon.
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120,125,130,.......180
180 = 120 + (n-1) 5
60/5 = n-1
12 = n-1
n = 13
180 = 120 + (n-1) 5
60/5 = n-1
12 = n-1
n = 13
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