A 2D seven sided figure is called a heptagon. A 3D seven faced polygon is called a heptahedron.
A dodecahedron.
A five sided 3d shape is called a pentehedron
It's a pentagonal prism or a hexagonal pyramid. (maybe there are other answers)
a 4 sided 3d shape is called a triangular prism!!!!!!!!!!!!!!!
the name of a 20 sided 3d shape is called a icosahedron
A 2D seven sided figure is called a heptagon. A 3D seven faced polygon is called a heptahedron.
Dodecahedron
A dodecahedron.
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A 12 sided 3D shape is called a dodecahedron.
A five sided 3d shape is called a pentehedron
pentagonal pyramid
A 3D 5 sided shape is called a dodecahedron. It is a solid with 20 vertices, 30 edges and 12 equal pentagonal triangular faces.
It's a pentagonal prism or a hexagonal pyramid. (maybe there are other answers)
An 11-sided 3D shape is a hendecahedron.
I believe it is tridecahedron.