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.)

Name: 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.)
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Question

Quizplus · Accepted Answer

A nonagon has 9 sides. The number of diagonals is given by the formula n(n-3)/2, where n is the number of sides. So, the number of diagonals of a nonagon is 9(9-3)/2 = 27.

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