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How many diagonals does a 2d decagon have?

Anonymous

∙ 8y ago

Updated: 11/1/2022

54 Diagonals.

* * * * *

A polygon with n sides has 1/2*n*(n-3) diagonals. So a decagon would have 1/2*10*7 = 35 diagonals. How the Community answer got 54 is anybody's guess!

Wiki User

∙ 8y ago

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Continue Learning about Math & Arithmetic

how many diagonals decagon have?

35

How many line segmants are in a decagon?

A decagon has 10 sides and 35 diagonals

How many vertices does a 2d decagon have?

Ten.

Is a decagon 2D?

Yes.

What polygon has 20 diagonals?

decagon

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