# Area of a Regular Polygon 81 cm with 9 sides Calculator

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## Area of a Regular Polygon 81 cm with 9 sides is 40558.9485353 cm²

Area of a Regular Polygon 81 cm with 9 sides is 40558.9485353 cm²

## Area of a Regular Polygon 81 cm with 9 sides in other units

Value | unit |
---|---|

0.4055895 | km² |

0.2520222 | mi² |

405.5894854 | m² |

1330.6741645 | ft² |

15968.0899745 | in² |

443.5580548 | yd² |

40558.9485353 | cm² |

405589.485353 | mm² |

**Steps:**

Given that Side, a = 81 cm and No of sides, n = 9

We know that, **Area = n * a² * cot(π/n) /4 **

Put the values in area Formula.

A = 9 * cm² * cot(π/9)/4

Simplify the above equation

A = 40558.9485353 cm²

∴ Area of a Regular Polygon 81 cm with 9 sides is 40558.9485353 cm²