A Kirkland, Wash., startup has landed $40 million to grow its business recycling end-of-life used tires into new materials.

A 3D shape with regular polygonal faces, meeting at equal angles, is a platonic solid. There are five platonic solids, the tetrahedron, cube, octahedron, dodecahedron and icosahedron. A prism is a ...

That means that the cross-section is the same throughout the length of the prism. The polygon shape of the cross-section may be used to name the prism. A prism with a triangle-shaped cross-section ...

A net is made from polygons that can be folded and joined to make a polyhedron. Here is the net of a triangular prism. Why not see how much you know about this topic already? Then complete the ...

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.