You just call it a decagon. If all the angles and sides are equal then it's a regular decagon. If not, it's an irregular decagon.
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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.
Decagon(10 sides polygon).
a shape with 10 sides is called a decagon.
decagon
decagon