if a polygon has 20 diagonals then the total number of sides it has is __ .
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Answered by
2
Answer:
8
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Answered by
1
Answer:
Octagon
Step-by-step explanation:
The number of diagonals of an n-sided polygon is n(n - 3) /2
An octagon has 8(8-3)/2 = 8 x 5/2 = 20 diagonals
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