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# Geometry

### Chapter 1

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

coordinate plane | a plane for which two perpendicular number lines that intersect at their zero points have been used to match the points of the place one-to-one with ordered pairs of numbers |

ordered pair | a pair of numbers given in a specific order. ordered pairs are used to locate points on a plane. |

collinear points | points that lie on the same line. |

noncollinear points | points that do not lie on the same line. |

plane | a basic undefined term of geometry. planes can be thought of as flat surfaces that extend forever in all directions and have no thickness. in a figure a plane is represented by a parallelogram. |

line | a basic undefined term of geometry. lines extend indefinatly and have no thickness or width. in a figure a line is shown with arrows at each end. named by lowercase script letters |

point | a basic undefined term of geometry. points have no size. in a figure a point is represented by a dot. a point is named by a capital letter |

coplaner points | points that lie on the same plane, existing in the same plane, there can be lines or figures on the same plane. |

space | a boundless three-dimensional set of all points |

area of a rectangle | the formula for the area of a rectangle is A=LW. where A represents the area expressed in square units, L represents the length, and W represents the width |

area | the number of square units contained in the interior of a figure |

perimeter | the number of units around a figure |

perimeter of a rectangle | the formula for the perimeter of a rectangle is p=2W=2L, where p represents the perimeter, l represents the length of the rectangle, and w represents the width of a rectangle |

between | in general, B is between A and C if anf onlu if A, B, and C are collinear and AB+BC=AC |

measure | the length of AB, written as AB, is the distance between AB |

postulate | A statement that describes a fundamental relationship between the basic terms of geometry. postulates are accepted as true without truth. |

postualte 1-1(ruler postulate) | the points on any line can be paired with the real numbers so that, given any two points P and Q on the line, P corresponds to zero, and Q corresponds to a positive number |

distance | it is always positive, and on a number line the formula is d=/a-b/ |

postulate 1-2(segment addition postulate) | if Q is between P and R, then C. if |

Created by:
amcalva