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The following table gives the number of ...

The following table gives the number of sides and the number of diagonals of a polygon.
`{:("Number of sides",3,4,5,6,7,8),("Number of diagonals",0,2,5,9,14,20):}`
Write a formula to find in terms of n.

Text Solution

Verified by Experts

The correct Answer is:
`d=(n(n-3))/(2)`
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