Find the number of diagonals of a nonagon (9 sides). (A line segment connecting any two nonadjacent vertices is called a diagonal of the polygon.)
A)27
B)18
C)81
D)9
E)72

Question

Quizplus · Accepted Answer

A nonagon has 9 sides. The number of diagonals can be calculated using the formula: d = n(n-3)/2, where n is the number of sides. Substituting n = 9, we get d = 9(9-3)/2 = 9(6)/2 = 27.

Find the Number of Diagonals of a Nonagon (9 Sides)