The shape you're referring to is call a decagon.
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Decagon. Dec=10
A 3d shape with 10 sides is called a decahedron. I have added a link with some pictures of them. As you can see they look very different but all have 10 sides or faces.
It is the decagon.
the answer to this question is simple. any shape with more than 10 sides with two exceptions is the number of sides then gon. example: 12 sides= 12-gon, 13 sides=13-gon , etc.
I assume you want the name of each shape, not just the generic polygon which refers to any multi-sided shape.5 sides - pentagon6 sides - hexagon7 sides - heptagon8 sides - octagon9 sides - nonagon10 sides - decagon