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# 7th grade final

### I have to study

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

How due you find the circumfrence | C=dπ |

How due you find the area of a prism | L=P×h & SA=L+2B |

How do you find a pyramid | L=1/2 P×L & SA=L+B |

How do you find the area of a square | A=L×W |

How do you find the area of a rectangle | A=L×W |

How do you find the area of a parallelogram | A=B×H |

How do you find the area of a triangle | A=b×h/2 |

How do you find a trapezoid | A=b1+b2/2×H |

How do you find the area of a circle | A=π r² |

How do you find the area of a semi circle | A=π r²/2 |

How do you find the percent increase/decrease | difference over original *100 |

How do you find the sales tax, tip, and commission | Whole*%= Part |

How do you find the inter quartile range | Quartlie 1 - Quartile 3= inter quartile range |

How do you find the mean absolute deviation | You find the mean of the data set and then subtract all the numbers in the data set by the mean. And add all those numbers up and divide them by the numbers in the data set to get the MAD |

How do you find the area of a rectangle attached to semi circle | You first find the area of the rectangle first, then you divide the diameter of the circle by 2 to get the radius. ( only if you have to) and do the radius to the power of 2 * pie. And then add them all up to get the totally area |

Created by:
jonati