Question

Euler's polyhedron formula for truncated icosahedron

Answer 1

You already know that a polyhedron has faces (F), vertices (V), and edges (E). But Euler's Theorem says that there is a relationship among F, V, and E that is true for every polyhedron. That's right — every polyhedron, from a triangular prism to a hexagonal pyramid to a truncated icosahedron.