In a polygon the number of diagonals 77. Find the number of sides of the polygon.

Explanation

To find the number of sides of a polygon given that it has 77 diagonals, we can use the formula for the number of diagonals in a polygon:

\[ D = \frac{n(n - 3)}{2} \]

where \(D\) is the number of diagonals and \(n\) is the number of sides.

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