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18. If a polygon has n sides, then it has n-2 triangles.

There are 18 triangles in a 20 sided polygon.

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Q: How many triangles are in a 20 sided polygon?

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unknown

it would have 18 triangles because u take 2 away each time.

Duodecagon <--wrong... a duodecagon is a 12-sided polygon. icosagon is a 20 sided polygon.

A 20-sided polygon is an icosagon.(see related link)

A 20-sided polygon is called an icosagon.

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unknown

18 triangles

There are 20 triangles inside a 22 sided polygon

It can be divided into 18, hope this helps!

it would have 18 triangles because u take 2 away each time.

A 32 sided polygon is also called a triacontadigon (or triacontakaidigon) or 32-gon has 20 triangles and 12 pentagons.

20 triangles will fit into a 22 sided polygon whose interior angles add up to 3600 degrees

20 of them.

Duodecagon <--wrong... a duodecagon is a 12-sided polygon. icosagon is a 20 sided polygon.

A 20-sided polygon is an icosagon.(see related link)

A 20-sided polygon is called an icosagon.

The name of a 20 sided polygon is Icosagon.