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# CHSCheyMVocab4.1-4.7

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

A comparison of two quantities by division. Give examples. | Ratio E.G. 5:8; 5 to 8; 5/8 |

A ratio that compares quantities with different units. Examples. | Rate E.G. MI/HR; FT/SEC or MI/GAL |

Rate for one unit of a given quantity. Examples. | Unit rate E.G. 55 MI/1 HOUR; 30 FT/ 1 SEC; 32 MI/ 1 GAL |

An equation stating that two ratios are equal. | Proportion |

Can be found by multiplying the numerator of one ration by the denominator of the second ratio. In proportions, they are equal. | Cross products E.G. 6/10 9/15 6 x 15 = 90; 9 x 10 = 90 Cross products are equal in proportions. |

Same shape, not necessarily the same size. | Similar figures |

Equal measures of angles. | Congruent angles |

Corresponding angles that are congruent and corresponding sides for proportions. | Similar polygons |

To make a figure larger or smaller. | Dilation |

The ratio of one side of the original figure to the corresponding side of the dilated figure. | Scale factor E.G. DILATED SIDE/ORIGINAL SIDE |

A scale factor that is greater than one. | Enlargement |

A scale factor that is less than one. | Reduction |

A model that is similar to the actual model it presents. | Scale model |

The ratio of the length of the model to the actual corresponding length of the object. | Scale |

Uses proportions and similar triangles to measure distances that would be difficult to measure directly. | Indirect measurement |

Created by:
nyxshadow