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# geometry

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

angle | Two rays that have the same endpoint. |

vertex | The common endpoint of the two rays in an angle. |

protractor | An instrument used to and draw angles. |

acute angle | An angle whose measure is between 0º and 90º. |

right angle | An angle whose measure is 90º. |

obtuse angle | An angle whose measure is between 90º and 180º. |

straight angle | An angle measuring 180º. |

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

ray | Part of a line that has one endpoint and extends forever in one direction. |

parallel lines | In a plane, lines that never cross and stay the same distance apart. |

intersecting lines | Lines that pass through the same point. |

perpendicular lines | .Two lines that intersect to form square corners or right angles |

point | An exact location in space. |

line segment | Part of a line having two endpoints. |

degrees (º) | A unit of measure for angles and temperature. |

polygon | A closed plane figure made op of line segments. |

regular polygon | A polygon that has sides of equal length and angles of equal measures. |

triangle | A polygon with 3 sides. |

quadrilateral | A polygon with 4 sides. |

pentagon | A polygon with 5 sides. |

hexagon | A polygon with 6 sides. |

octagon | A polygon with 8 sides. |

equilateral triangle | A triangle whose sides all have the same length. |

isosceles triangle | A triangle with two sides of the same length. |

scalene triangle | A triangle in which no sides have the same length. |

right triangle | A triangle in which one angle is a right angle. |

acute triangle | A triangle whose angles are all acute angles. |

parallelogram | A quadrilateral with both pairs of opposite sides parallel. |

trapezoid | A quadrilateral that has exactly one pair of parallel sides. |

rectangle | A parallelogram with four right angles. |

rhombus | A parallelogram with all sides of the same length. |

square | A rectangle with all sides the same length. |

generalization | A general statement. Example: A generalization about rectangles applies to all rectangles. |

Created by:
17egardn