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# Math 7 2018-2019

### SSC 7th Grade Math Vocabulary

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

Absolute value | A number's distance from zero |

Additive inverse | What you add to a number to get zero. |

Expression | Numbers, symbols and/or operations grouped together that show the value of something |

Associative property | For all real numbers, the sum or the product is always the same, regardless of their grouping |

Circumference | the distance around a circle |

Commutative property | all real numbers can be added or multiplied in any order with out changing the answer. |

Complementary angles | two angles that add to 90 degrees |

Compound event | two or more simple events |

Constant | a fixed value (a value that does not change) |

Distributive property | a property that lets you multiply a sum or difference by multiplying each term separately and then adding or subtracting the products |

Inequality | A mathematical sentence that shows the relationship between quantities that are not equal |

Percent of change | the amount stated as a percent that a number increases or decreases |

Perpendicular lines | intersecting lines that form right angles |

Probability | the chance that something will happen - how likely it is that some event will happen |

Proportion | two ratios (or fractions) that are equal |

Rate | a ratio that compares two quantities measured in different units |

Scale | The ratio of the length in a drawing (or model) to the length of the real thing |

Similar | figures with the same shape but not necessarily the same size |

Straight angle | an angle that is exactly 180 degrees |

Supplementary angles | two angles that add to 180 degrees |

Surface area | The sum of the areas of the faces of a 3D figure. |

Vertical angles | A pair of opposite congruent angles formed by intersecting lines |

Volume | The number of cubic units needed to fill a given space |

Experimental probability | The ratio of the number of times an event actually occurs to the total number of trials performed |

Theoretical probability | The ratio of the number of ways an outcome could happen to the number possible outcomes |

Integer | whole numbers, their opposites, and zero |