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# Geometry

### Vocabulary on the subject of shapes, perimeter, and lines.

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

How do you find the area of a rhombus? | A= 1/2 (D1 + D2) |

How do you find the area of a trapezoid? | A= B1 +B2/ 2 divided by h |

How do you find the area of a circle? | A= πr² |

How do you find area of a parallelogram? | A= bh |

How do you find the area of a triangle? | A=(bh) divided by 2 |

What is an acute angle? | An angle less than 90° |

What is a right angle? | An angle that is exactly 90° |

What is an obtuse angle? | An angle that is larger than 90° |

What is square? | A number multiplied by itself. (Ex: 6² = 36) |

What is square root? | A number that produces a specified quantity when multiplied by itself. (Ex: Square root of 144 = 12 because 12 x 12 = 144) |

What is pi? | A name given to the ratio of the circumference of a circle to the diameter. |

What is an isosceles triangle? | A triangle with two equal sides and angles. |

What is a right triangle? | A triangle with one right angle. |

What is an equilateral triangle? | A triangle with all sides and angles equal. |

What is a scalene triangle? | A triangle with all sides and angles different. |

What is the sum of all angles? | 180° |

The largest angle is opposite the _____ side. | Longest. |

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