Question

the number of diagonals in a polygon having n sides

Answer 1

The number of diagonals in a polygon = n(n-3)/2,

where n is the number of polygon sides.

For a convex n-sided polygon, there are n vertices,

and from each vertex you can draw n-3 diagonals,

so the total number of diagonals that can be drawn is n(n-3).

hope it helps... regards

Answer 2

Number of diagonals of polygon having n sides is n(n-3)/2