SOLUTION: A regular polygon of (2k+1)sides has 140 as the size of each interior angle. Find k

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Question 627627: A regular polygon of (2k+1)sides has 140 as the size of each interior angle. Find k
Answer by richard1234(7193) About Me  (Show Source):
You can put this solution on YOUR website!
Exterior angle = 40 deg

# of sides = 360/40 = 9, so 9 = 2k+1, k = 4.