A 3D cross is called a "cross polytope" or a "hypercube." In geometry, a cross polytope is a geometric shape that extends into three dimensions and is formed by connecting the vertices of a regular polygon in one dimension with the vertices of a regular polygon in another dimension. The term "hypercube" is often used to refer to a specific type of cross polytope, specifically a four-dimensional shape that extends the concept of a cube into higher dimensions.
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a pyramid is 3d
The cone IS a 3d figure.
A 3d oval is called an ovoid. Egg would work as well
3d shapes with six faces are called hexahedra.
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