a 12 sided polygon!:)
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Oh dear! A 12 sided polygon is a dodecagon, not a decagon. The correct answer is 10 sides.
It depends on whether or not the decagon is a perfect decagon or a complex decagon. However, a perfect decagon has no acute angles.
decagon
Decagon
The anwser is a Decagon.
No, a decagon is not a quadrilateral.
Decogon * * * * * A decagon, actually.
it's a decagon.
Decagon.
Decagon
yes a decagon can tile!!!!!!!!!!
Its not a do-decagon its a dodecahedran!!
Decagon