# What is the number of diagonals in a(i) heptagon (ii) octagon(iii) polygon of 12 sides

(i) Number of diagonals in Heptagon is [n represents number of sides]  = 14

So, Number of diagonals in heptagon is 14.

(ii) Number of diagonals in Octagon is [n represents number of sides]  = 20

So, Number of diagonals in octagon is 20.

(iii) Number of diagonals in polygon of 12 sides is [n represents number of sides]  = 54

So, Number of diagonals in polygon of 12 sides is 54.

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