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Find the number of diagonals of a polygon of 13 sides.

Find the number of diagonals of a polygon of 13 sides.
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4 votes
Find the number of diagonals of a polygon of 13 sides.

User Sandesh
by
8.4k points

2 Answers

2 votes
n(n-3)/2 is the number of diagonals. Explain in words why this works. A 13-gon would have 13(13-3)/2 = 65 diagonals.
User Adrian Bigland
by
7.6k points
4 votes

Answer:

65

Explanation:

13(13-3)/2 = 65 diagonals.

User ArunK
by
8.6k points
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