Question

pentagons have 5 diagonals, as illustrated below. how many diagonals does the heptagon (7 sides) below have?

Answer 1

14

Explanation:

n = number of sides

`(n(n-3))/(2)`

`(7(7-3))/(2)`

`(7(4))/(2)`

`(28)/(2)`

14

Helping in the name of Jesus.