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# Unit 4 Math

### Circles,Lines,And Angles

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

Ray | A part of a line the has one endpoint and extends without end in the other direction |

Angle | A figure formed by two rays or two endpoints with a common endpoint |

Line | A straight path that goes on forever in opposite directions |

Perpendicular | Lines,line segments,or rays are perpendicular if they form a right angle |

Parallel | The same distance apart at every point |

Obligue | Lines that are not parallel or perpendicular |

Intresect | To cut or divide by passing through or across |

Protractor | A tool used to measure angles |

Degree | A unit for measuring angles and temperatures |

Right Angle | A angle that measures 90 degrees |

Straight Angle | A angle of 180 degrees |

Opposite angle | when two lines intersect |

Verticle angle | Pairs of opposite angles formed by intersecting lines |

supplementary angles | angles having a sum of 180 degrees |

complementary angles | Angles having a sum of 90 degrees |

Polygon | 2d shape with straight sidess |

Congruent | same size and same shape |

Isosceles trisngle | A triangle with at least two congruent sides |

Equilateral triangle | A triangle with all equal sides |

Scalene triangle | A triangle with no equal sides |

Acute triangle | A triangle with acute angle |

Obtuse triangle | A triangle with one obtuse angle |

Right triangle | A triangle with one right angle |

Right trapezoid | A trapezoid with at least one right angle |

Circle | A plane figure that forms a closed path so that all the points on the path are the same distance from a point called the center |

Reflex Angle | A angle greater then 180 degrees |

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