# Areas, sectors formulas

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s36131's
version from
2016-12-29 05:41

## Section

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

Area of a circle | π r sq |

Circumference of a circle | 2π r |

Area of semicircle | 1/2 π r sq |

Perimeter of semicircle | π r+2r |

Area of sector | π r sqθ/360 or 1/2 lr (wher l= length) |

Area of minor segment | πr sq θ/360 - 1/2r sq sinθ |

Area of major segment | Area of circle - area of a quadrant |

Area of a quadrant | πr Sq /4 |

Perimeter of a quadrant | πr/2 + 2r |

Area of minor sector | θ/360* πr sq |

Area of major sector | 360-θ/360* πr sq |

Area of a ring | π(R sq-r sq) |

Perimeter of a sector | 2r + 2πrθ/360 |

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