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Find the number of diagonal in hexagon.
Given: A hexagon.
To do: To find the number of diagonals in a hexagon.
Solution:
Number of diagonals in a polygon$=\frac{n( n-3)}{2}$, here $n=$Number of sides of the polygon.
We have a hexagon, therefore $n=6$
$\therefore$ Number of diagonals in a hexagon$=\frac{6( 6-3)}{2}=9$
Thus, number of diagonals in a hexagon is $9$.
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