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Q: How many diagonals are there in an 11-sided figure?

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Diagonals connect corners of a figure. If you try to connect two corners of a three sided figure, the lines you draw will exactly mimic the sides of the figure. Because of this, a three sided figure has no diagonals.

A 4 sided quadrilateral has 2 diagonals.

90

54

A pentagon is a 5 sided figure.

Related questions

Undecagon is a 11sided figure

There are 170 diagonals

Diagonals connect corners of a figure. If you try to connect two corners of a three sided figure, the lines you draw will exactly mimic the sides of the figure. Because of this, a three sided figure has no diagonals.

0.5*(162-48) = 104 diagonals

0.5*(252-75) = 275 diagonals

A 4 sided quadrilateral has 2 diagonals.

9

90

7

54

1/2*(152-45) = 90 diagonals

There are 27 diagonals

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