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The number of diagonals D I a polygon of n sides is given in the formula D=n(n-3)/2.
Use the formula to find:
A. The number of diagonals in a polygon with 9 sides.

B. The number of sides of a polygon with 90 diafonals.
8 years ago

Answers

Steve
just plug in the numbers. Should not be too hard.
8 years ago

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