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1. | Two angles are said to be __________ if their sum is ninety degrees |

2. | The opposite sides of a square are... |

3. | A collection of related things |

4. | The chance of something happening in the future |

7. | A positive whole number |

8. | A number below zero |

9. | The square root sign |

11. | A _____ of a figure is a corner. |

13. | Another way of saying multiplicative inverse |

14. | Two lines or planes are ___________ to each other if the angle between them is 90 degrees |

15. | The number multiplied times a product of variables or powers of variables in a term |

17. | ____ is an additive identity |

18. | An equation that uses symbols for less than and greater than |

20. | A number with a decimal point in it that is a little more or less than the consecutive whole number |

21. | A rectangular or square array of numbers. Matrices can be written using brackets or parentheses |