A 3D shape with all straight edges and flat faces is a polyhedron. Other 3D shapes with least one curved surface are not polyhedra. A 3D shape with regular polygonal faces, meeting at equal angles, is ...
A prism is a solid shape that has the same cross-section all the way through. These three shapes are prisms. The first has a circular cross-section. The second has a rectangular cross-section. The ...
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