I would call (not cal) an 8 faced shape (not shap) an octahedron.
A shape with 7 sides is a heptagon
A heptahedron is a polyhedron with 7 faces, and you can make one with 15 edges.
Septagon
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nonagon A nonagon is a nine faced shape.
tetrahedron is a 4 faced 3d shape.
A seven-sided shape (polygon) is called a heptagon.
A six faced 3d shape is called a cube.
A twelve-faced shape is a dodecagon, also known as a dodecahedron.
a heptigon
No.