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How many diagonals are in a Decagon?

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Anonymous

∙ 16y ago
Updated: 11/10/2020

35.

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Wiki User

∙ 11y ago
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How many diagonals in decagon?

There are 35 diagonals in a 10 sided decagon


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A tetra-decagon is a 14 sided polygon having 77 diagonals


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A convex decagon has 10 sides. The formula for calculating the number of diagonals in a polygon is ( \frac{n(n-3)}{2} ), where ( n ) is the number of sides. For a decagon, substituting ( n = 10 ) gives ( \frac{10(10-3)}{2} = \frac{10 \times 7}{2} = 35 ). Therefore, a convex decagon has 35 diagonals.

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