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# Unit 8: Geometry

Term | Definition |
---|---|

Acute angle | n angle that measures less than 90° |

Area of a base | the area of a 2D figure that the surface of a solid object sits/stands on |

Area | the measurement attribute that describes the number of square units a figure or region covers ** A= LXW** |

Congruent | of equal measure, having exactly the same size and same shape |

Obtuse Angle | an angle that measures greater than 90° but less than 180° |

Parallel Lines | lines that lie in the same plane, never intersect, and are always the same distance apart; opposite sides |

Parallelogram | a quadrilateral with opposite sides that are parallel |

Perimeter | a linear measurement of the distance around the outer edge of a figure; **P= s + s + s + s......** |

Perpendicular Lines | lines that intersect to form right angles |

Polygon | a closed figure with at least 3 sides, where all sides are straight (no curves) |

Quadrilateral | a polygon with 4 sides, 4 angles, and 4 vertices |

Rectangle | a parallelogram with 4 right angles |

Rectangular Prism | a 3D solid with six faces that are all rectangles |

Rhombus | a parallelogram with 4 equal sides; opposite equal acute angles, and opposite equal obtuse angles |

Right Angle | an angle that measures exactly 90 degrees formed by perpendicular lines |

Square | a rectangle with 4 equal sides, 4 right angles, and 4 vertices |

Triangle | a polygon with 3 sides, 3 angles, and 3 vertices |

Vertex/vertices | a corner or a point where lines meet |

Volume | the amount of space taken up by an object, usually calculated by V = b X h x w |

Created by:
lozuna