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There are lots of shapes: a sphere, an ellipsoid, a smoothed blob.
A pentagonal prism has 15 edges
Spherical
Triangular prism
pentagon
Sphere
A 3D shape that has 6 edges is called a hexagonal prism.
corners of a 3d shape
A cube
A circle
triangular prism
It has 12 edges and 6 faces
Tweleve
Octagonal prism