GCSE(F),

The names of **3D** solid shapes should be known. The number of **faces** (the flat surfaces), the number of **edges** (where two faces meet), and the **vertices** (corners) should also be known.

Name | Shape | faces | edges | vertices | |
---|---|---|---|---|---|

Cube | 6 | 12 | 8 | All edges are the same length | |

Cuboid | 6 | 12 | 8 | All corners are right angles | |

Cylinder | 3 | 2 | 0 | No vertices, as two edges do not meet | |

Sphere | 1 | 0 | 0 | No edges and no vertices | |

Cone | 2 | 1 | 0 | No vertices, as it only has one edge | |

Triangular Prism | 5 | 9 | 6 | ||

Hexagonal Prism | 8 | 18 | 12 | ||

Square-based Pyramid | 5 | 8 | 5 | The bottom of the pyramid is a square | |

Tetrahedron | 4 | 6 | 4 | All edges are the same length |

1. Name a shape that has only three faces.

Answer: Cylinder

A circle at each end; and a curved surface going them.

2. What is the difference between cube and a cuboid?

Answer: The edges of a cube are all the same length; the edges of a cuboid vary in length.

The edges of a cube are all the same length; the edges of a cuboid vary in length.

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