A decagon has 10 sides
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A quadrilateral has four sides. The term "sdes" seems unclear, but if you're referring to vertices or angles, a quadrilateral has four vertices and four angles as well. If you meant something else by "sdes," please clarify for further assistance.
Its not a do-decagon its a dodecahedran!!
It depends on whether or not the decagon is a perfect decagon or a complex decagon. However, a perfect decagon has no acute angles.
There are 1440 degrees in a decagon.
A decagon has ten vertices.
A decagon has 10 sides.
A decagon has 10 sides
A decagon has 10 vertices.
There are 8 triangles in a decagon
A decagon has 10 sides
A ten sided decagon has 10 vertices