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# Chapter 8 geometry

### Geometry vocab

Question | Answer |
---|---|

Point | An exact location in space |

Line | A straight path of points that goes on forever in two directions |

Plane | An endless flat surface |

Line segment | Part of a line and has two end points |

Ray | Part of a line that has only one endpoint and extends forever in one direction |

Parallell lines | Never cross and stay the same distance part |

Intersecting lines | Pass through the same point |

Perpendicular lines | Intersecting lines that form square corners |

Angle | Formed by two rays that have the same endpoint |

Vertex | The common endpoint |

Acute angle | Has a measure between 0 and 90° |

Right angle | Has a measure of 90° |

Obtuse angle | Has a measure between 90° and 180° |

Straight angle | Has a measure of 180° |

Polygon | Closed plane figure made up of line segments |

Regular polygon | Sides of equal length and angles of equal measure |

Triangle | 3 sides |

Quadrilateral | 4 sides |

Pentagon | 5 sides |

Hexagon | 6 sides |

Octagon | 8 sides |

Equilateral triangle | All sides are the same length |

Isosceles triangle | Two sides the same length |

Scalene triangle | No sides are the same length |

Right triangle | One angle is a right angle |

Acute triangle | All three angles are acute |

Obtuse triangle | One angle is an obtuse angle |

Parallelogram | Both pairs of opposite sides parallel and equal in length |

Trapezoid | Only one pair of parallel sides |

Rectangle | A parallelogram with four right angles |

Rhombus | A parallelogram with all sides the same length |

Square | A rectangle wth all sides the same length |

Created by:
Jandwmcdonald