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# Unit 7 Vocab

### Geometry

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

Polygon | Simple, closed figure formed by 3 or more straight lines. |

Quadrilateral | A polygon with 4 sides and 4 angles. |

Parallelogram | A quadrilateral whose opposite sides are parallel and congruent (equal). |

Rectangle | A parallelogram with 4 right angles. |

Trapezoid | A quadrilateral with one pair of parallel sides called "bases". The other sides are called "legs". |

Rhombus | A parallelogram with 4 congruent (equal) sides. |

Square | A rectangle with 4 congruent (equal) sides and 4 right angles. |

Coordinate Plane | A plan having a vertical and horizontal number line intersecting at zero. |

Quadrants | One of the four areas on a coordinate plane. |

Ordered Pairs | A pair of numbers |

Origin | The point at which the x-axis and y-axis intersect on the coordinate plane. |

Transformations | A movement of a geometric figure on the coordinate plane. |

Translations | A transformation where a figure is slid horizontally, vertically, or both. |

Rotations | A transformation where a figure turns around a fixed point. |

Reflections | A transformation where a figure is flipped over a line. |

Dilations | A transformation where a figure changes size based on a scale factor. The figure either enlarges or shrinks. |

Clockwise | One direction to rotate a figure in the plane...from left to right. |

Counter-Clockwise | One direction to rotate a figure in the plane...from right to left. |

Vertical | The y-axis or moving up (positive) or down (negative). |

Horizontal | The x-axis or moving left (negative) or right (positive). |

Axis | A line used as a reference point in Geometry. |

Scale Factor | A number used as a multiplier to enlarge or shrink a figure. |

Prime | The symbol used to indicate the ordered pairs of an image after a transformation. |

Isoceles Trapezoid | A trapezoid where the legs are congruent (equal). |

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scash