Q: How many diagonals does a octagon has?

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There are 20 diagonals

40

No, they do not.

no

20 diagonals For any n-sided polygon, the formula for the number of diagonals is (n/2) x (n-3), so for an octagon it is (8/2) x (8-3) = 4 x 5 = 20.

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An octagon has 16 diagonals.

There are 20 diagonals

8 diagonals

4 diagonals

None, if it is an irregular octagon.

20

20

An octagon has four (4) diagonals, each connecting two opposite vertices.

there are 5, 6, or 7 diagonals in a pentagon

Sides: 8 Diagonals : 20

8

0.5*(82-24) = 20 diagonals