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# Math 8 Geometry

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

Translation | An image SLIDES on a graph. |

Reflection | An image FLIPS over a line of symmetry. |

Rotation | An image TURNS on a graph. |

Dilation | An image gets larger or smaller by a scale factor. |

Scale Factor | The number you multiply by. |

If Triangle ABC is dilated, what is it's new name? | Triangle A'B'C' |

The prime mark (for example: A') means.... | The new image after being transformed. |

Supplementary Angles | Two angles that add to make a straight line or 180 degrees. |

Vertical angles | Angles diagonal from each other are congruent. |

Adjacent angles | Angles that are beside each other. |

Complimentary Angles | Angles that add to make 90 degrees or a right angle. |

Triangles always have how many degrees? | 180 |

The exterior angle of a triangle is always equal to.... | The sum of the other two interior angles. |

Pythagorean Theorem is.... | a^2 + b^2 = c^2 |

Hypotenuse | Longest side of a right triangle; the side that doesn't touch the right angle (c in the Pythagorean Theorem) |

Legs of Right Triangle | The two shortest sides of a right triangle; the two sides that meet at the right angle (a and b in the Pythagorean Theorem) |

Volume of Cylinder | V = pi * r^2 * h |

Volume of Cone | V = 1/3 * pi * r^2 * h |

Volume of Sphere | V = 4/3 * pi * r^3 |