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- Faces;points.polyhedrons, Convex polyhedrons, Regular polyhedrons, Two important members of polyhedron family around are prisms and pyramids.

#### Related QuestionsVIEW ALL [41]

Using Euler’s formula, find the unknown.

Faces |
? | 5 | 20 |

Vertices |
6 | ? | 12 |

Edges |
12 | 9 | ? |