The formula isYes n(n-3)/2

# GRE Permutation and geometry question?

Are there are formula showing relation between diagonal and no of sides of a polygon?

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## 2 Answers By Expert Tutors

Henry I. answered • 03/14/19

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**3**)/**2**, where n is the number of polygon sides. For a convex n-sided polygon, there are n vertices, and from each vertex you can draw n-**3** diagonals, so the total number of diagonals that can be drawn is n(n-**3**).

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