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Elis [28]
3 years ago
15

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

Mathematics
2 answers:
aleksley [76]3 years ago
7 0

Answer:

65

Step-by-step explanation:

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

Alex17521 [72]3 years ago
7 0
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.
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