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# Chapter 11 Vocab

### Chapter 11 Vocabulary

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

base | In two dimensions, one side of a triangle or polygon that is used to help find the area. In three dimensions, a plane figure, usually a polygon or circle, by which a three-dimensional figure is measured or named. |

congruent | Having the same size and the same shape. |

equilateral triangle | A triangle with three congruent sides. |

heptagon | A polygon with seven sides and seven angles. |

isosceles triangle | A triangle with two congruent sides. |

lateral face | Any surface of a polyhedron other than a base. |

nonagon | A polygon with nine sides and nine angles. |

polygon | A closed plane figure formed by three or more line segments. |

polyhedron | A solid figure with faces that are polygons. |

prism | A solid figure that has two congruent, polygon-shaped bases, and other faces that are all rectangles. |

pyramid | A solid figure with a polygon base and all other faces are triangles that meet at a common vertex. |

quadrilateral | A polygon with four sides and four angles. |

regular polygon | A polygon in which all sides are congruent and all angles are congruent. |

scalene triangle | A triangle with no congruent sides. |

unit cube | A cube that has length, width, and height of 1 unit. |

volume | The measure of the space that a solid figure occupies. |

angle | A shape formed by two rays that share the same endpoint. |

vertex | The point where two or more rays meet; the point of intersection of two sides of a polygon; the point of intersection of three (or more) edges of a solid figure; the top point of a cone. |

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CoachD