Question

no.of diagonals is twice the no.of sides,polygon: how many sides of a heptagon octagon octagon and decagon have ?​

Answer 1

No. of sides in

heptagon - 7 sides

no. of diagonals- n(n-2)/ n

n is no. of sides diagonals-

so, 5 diagonals can form

octagon 8 sides

decagon 10 sides

diagonal in octagon. 6

diagonal in decagon. 8

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