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An 11 sided polygon is a hendecagon and a 12 sided polygon is a dodecagon

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endecagon and dodecagon, respectively.

Q: What are the names of an 11-sided polygon and a 12-sided polygon?

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what is 12 different kind of polygon

the name of a polygon for a polygon with 13+ sides is called an "n-gon"

The name of a 11 sided polygon is Hendecagon.

a polygon

it is called a dodecagon. this is also approved by teachers so they will not burden you!

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Undecagon is a 11sided figure

What polygon? Your asking "what are two names to describe a polygon" but haven't given a polygon...

they came from how many sides are on the polygon

a polygon

what is 12 different kind of polygon

the name of a polygon for a polygon with 13+ sides is called an "n-gon"

The name of a 11 sided polygon is Hendecagon.

a polygon

quadrilateral

it is called a dodecagon. this is also approved by teachers so they will not burden you!

I suggest you forget about memorizing fancy names - which really serve no useful purpose - and just call them "20-sided polygon", "21-sided polygon", etc.

A pentagon.