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# Geometry Basics II

### Polygons

Term | Definition |
---|---|

Pentagon | A polygon with five sides |

Hexagon | A polygon with six sides |

Octagon | A polygon with eight sides |

Decagon | A polygon with ten sides |

Regular Polygon | A polygon in which all the sides and angles are equal |

Square | A quadrilateral that has four equal sides and four right angles |

Rectangle | A quadrilateral with four right angles and two pairs of parallel sides. The opposite sides must be equal, but all four sides may not be. |

Parallelogram | A quadrilateral with two pairs of parallel sides |

Rhombus | A quadrilateral that has four equal sides, but no right angles |

Trapezoid | A quadrilateral with exactly one pair of parallel lines |

Equilateral Triangle | A triangle that has three equal sides and three equal angles |

Right Triangle | A triangle in which two sides meet at a ninety-degree angle |

Isosceles Triangle | A triangle that has at least two equal sides and angles |

Scalene Triangle | A triangle in which all three sides have different lengths |

180 degrees | The sum of the angles for any angle |

Created by:
Rvanmeter