GCSE(F),

A list of the more important polygons is given below. A polygon is a 2D shape that consists only of straight sides.

Sides | Name | Special type |
---|---|---|

3 | Triangle | Equilateral triangle |

4 | Quadrilateral | Square |

5 | Pentagon | |

6 | Hexagon | |

7 | Heptagon | |

8 | Octagon | |

9 | Nonagon | |

10 | Decagon |

1. What is the name of a regular 3-sided polygon?

Answer: Equilateral Triangle

Note that the only regular triangle is an equilateral triangle.

2. Is a rhombus (a parallelogram with 4 sides of equal length) a regular polygon?

Answer: No

There are two sizes of angles in a rhombus. It is therefore not a regular polygon.

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