The number of diagonals in a hexagon is __

Question

The number of diagonals in a hexagon is ___.

Answer:
:
We know that, number of diagonals of a n-gon

= \frac{n (n - 3)}{2}

.
Here,

n = 6

, therefore the number of diagonals

= \frac{6 (6 - 3)}{2} = \frac{6 \times 3}{2} = 9

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