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How many triangles are formed by the diagonals in a 21 sided polygon?

Anonymous

∙ 13y ago

Updated: 4/28/2022

The number of triangles formed by the diagonals of a 21 sided polygon is C(21,3) = 21x20x19/3x2x1 = 1,330.

Wiki User

∙ 13y ago

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How many triangles will be formed in 100 sided polygon if the diagonals are drawn from a single vertex?

98

How many triangles can be formed from a vertex of 20 sided polygon?

18 triangles

How many diagonals in a 15 sided polygon?

There are 90 diagonals in a 15-sided polygon.

How many diagonals are in a 7 sided polygon?

A 4-sided polygon has 2 diagonals. A 5-sided polygon, 5. 6-sided, 9. By induction, an n-sided polygon has 'n*(n-3)/2' diagonals. "n" is how many sides a shape has. so, (7)*(7-3)/2 now we have, 7*4/2 so, 28/2 = 14 Therefore, a 7-sided polygon would have 14 diagonals.

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

Related Questions

How many triangles can be formed by the diagonals of one vertex of a four-sided polygon?

Two triangles can be formed by the diagonals of one vertex of a four-sided polygon.

How many triangles can be formed by diagonals of one vertex of a one hundred sided polygon?

98

How many triangles will be formed in 100 sided polygon if the diagonals are drawn from a single vertex?

98

How many triangles can be formed from a vertex of 20 sided polygon?

18 triangles

What is the name of a regular polygon that has 95 diagonals?

There is no such polygon that has 95 diagonals because a 15 sided polygon has 90 diagonals and a 16 sided polygon has 104 diagonals.

How many diagonals does an 11-sided polygon have?

An 11 sided polygon has 44 diagonals.

How many diagonals in a 15 sided polygon?

There are 90 diagonals in a 15-sided polygon.

How many diagonals does a four-sided polygon have?

A four-sided polygon has two diagonals.

How many triangles in a 13 sided polygon?

To determine the number of triangles that can be formed within a 13-sided polygon, we can use the formula nC3, where n is the number of vertices in the polygon. In this case, n = 13. So, 13C3 = 286 triangles can be formed within a 13-sided polygon.

How many triangles can be formed in a 15 sided polygon when one of its vertices is joined to the other vertices?

13 triangles will be formed

How many triangles in a 17 sided polygon?

there are 15 triangles in a 17 sided polygon

16 sided figure diagonals?

A 16 sided polygon has 104 diagonals

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