Question

find numbers diagonals of a 8 sided polygon.
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Answer 1

Answer:

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Here your answer

n(n-3)/2

Step-by-step explanation:

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Answer 2

Answer:

a square has =4(4-3)/2

= 4×3/2

=2

Step-by-step explanation:

an octagon has = 8 (8-3)/2

= 8×5/2

= 20

therefore 8 sided polygon has 20 diagonals.