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Mathematics, 31.05.2021 14:00 jennelledenise

An n sided polygon has n (n-3) by 2 diagonals a) How many sides has a polygon with 665 diagonals?
b)Why cannot a polygon have 406 diagonals?

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An n sided polygon has n (n-3) by 2 diagonals a) How many sides has a polygon with 665 diagonals?
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