a decagon has 10 sides- the stem deca- means ten and -gon means side, therefore decagon means a ten-sided object
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A shape with 9 sides is a nonagon. A decagon has 10 sides.
Any shape with 10 sides is called a decagon. A regular decagon is a shape with 10 even sides, so you are looking for an irregular decagon.
A decagon is a shape that has ten sides. As long as the figure has ten sides to it, then it is a decagon.
Decagon
decagon