How many diagonals are there in a hexagon ?

A polygon is entirely made up of straight lines only. A hexagon ABCDEF is a six sided polygon. How many diagonals are there in the hexagon?

How many diagonals are there in a pentagon ?

How many diagonals are there in a octagon ?

How many triangles can be formed by joining the vertices of a hexagon? How many diagonals are there for hexagon?

How many diagonals are there in a polygon having 12 sides ?

How many diagonals are there in a polygon of n sides?

A polygon is entirely made up of straight lines only. A hexagon ABCDEF is a six sided polygon. .How many angles are there in the hexagon?

What is the formula to find how many diagonals are there in a polygon with n sides?