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The number of diagonals in an octagon is?

The number of diagonals in an octagon is? Correct Answer 20

Concept:

The no. of diagonals in a polygon is given by: n(n - 3)/2

Calculation:

Here, we have to find the no. of diagonals for an octagon

As we know that, for an octagon we have no. of sides n = 8

So, no. of diagonals of an octagon = 8 × (8 - 3) / 2 = 20

Hence, option 1 is the correct answer.

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