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How many diagonals does a 20-sides polygon have?

Updated: 11/5/2022

Wiki User

∙ 13y ago

Best Answer

A polygon with n sides had n*(n-3)/2 diagonals.

So a 20 sided polygon would have 20*17/3 = 170

Wiki User

∙ 13y ago

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Continue Learning about Math & Arithmetic

How many diagonals does a polygon with 3 sides have?

That polygon is called a "triangle". It has no diagonals.

How many diagonals are there in a polygon of 11 sides?

how many diagonals are there iin a polygon of 11 sides

How many diagonals does an 11-sided polygon have?

An 11 sided polygon has 44 diagonals.

How many diagonals does a four-sided polygon have?

A four-sided polygon has two diagonals.

How many number of side does it have in a closed polygon with 14 diagonals?

A polygon with 14 diagonals will have 7 sides

Related questions

How many diagonals does a polygon with 3 sides have?

That polygon is called a "triangle". It has no diagonals.

How many diagonals are there in a polygon of 11 sides?

how many diagonals are there iin a polygon of 11 sides

How many diagonals in a 15 sided polygon?

There are 90 diagonals in a 15-sided polygon.

How many diagonals does an 11-sided polygon have?

An 11 sided polygon has 44 diagonals.

How many diagonals does a four-sided polygon have?

A four-sided polygon has two diagonals.

How many diagonals are in a 20 sided polygon?

There are 170 diagonals

How many diagonals are in a10 sided polygon?

It has 35 diagonals

How many diagonals are in a polygon with 14 sides?

There are 77 diagonals

How many number of side does it have in a closed polygon with 14 diagonals?

A polygon with 14 diagonals will have 7 sides

How many diagonals does a 44 sided polygon has?

It has 40 diagonals.Improved Answer:-Using the formula for diagonals of a polygon: 0.5*(442-132) = 902 diagonals

How many diagonals can you draw in a polygon with 18 side?

153 diagonals.

How many sides are there in the polygon if the number of diagonals is twice as the number of sides?

A 7 sided polygon has 14 diagonals

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