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# unit 4

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

A part of a line with one endpoint and extends forever | ray |

a figure formed from to lines or rays together. | angle |

a straight path that goes on forever in both directions | line |

lines, line segments, rays are perpendicular if they form right angles | perpendicular |

the same distant apart at every point | parallel |

lines that are not parallel or perpendicular | obligue |

to cut or divide by passing through or across | intersect |

a tool that measures angles | protractor |

a unit for measuring angles | degree |

a ninety degree angle | right angle |

a 180 degree angle | straight angle |

angles having a sum of 180 degrees | supplementary angles |

angles having a sum of 90 degrees | complimentary angles |

when 2 lines intersect they form these | opposite angle |

pairs of opposite formed by intersecting lines are called these | vertical angle |

a closed shape with no curved sides | polygon |

the exact same shape and size | congruent |

a triangle with 2 congruent sides | isosceles triangle |

a triangle with the exact same sides | equilateral triangle |

a triangle with all different sides | scalene triangle |

a triangle with three acute angles | acute triangle |

a triangle with one right angle | right triangle |

a triangle with one obtuse angle | obtuse triangle |

trapezoid with at least | right trapezoid |

a plane figure that forms a closed path so that every spot is the same distance from the center | circle |

reflex angle a angle greater than 180 degrees |

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