Question

how many diagonal can be drawn by joining the vertices of an octagon
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Answer 1

Answer:

a)20

Step-by-step explanation:

We can find this using the formula: n(n-3)/2 (where n is the no. of sides)

No. of sides in octagon= 8

So,

=8(8-3)/2

=8(5)/2

=40/2

=20

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