Question

If a polygon has 54 diagonals, then the number of sides of the polygon is:

Answer 1

The number of edges from sides will be n C 2 . Is this answer still relevant and up to date? Thus for given number of 54 diagonals, the number of sides are 12 ( Arrived at after substituting values for diagonals in the above mentioned formulae and simplifying.) The polygon which has 12 sides is called Dodecagon.