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

Question

Philoid · Accepted Answer

(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.