The area of an decagon is 12. Calculate side, perimeter

A = 5/2s

A = 2.5s

s^{2} = | 2 x A |

5 x 3.3 |

s^{2} = | 2 x 12 |

5 x 3.3 |

s^{2} = | 24 |

15. |

s

s = √

s =

P = 10 x side

P = 10 x

P =

Interior Angle Sum = (sides - 2) x 180°

Interior Angle Sum = (10 - 2) x 180°

Interior Angle Sum = 8 x 180°

Interior Angle sum = 1440°

Diagonals = | n(n - 3) |

2 |

Diagonals = | 10(10 - 3) |

2 |

Diagonals = | 10(7) |

2 |

Diagonals = | 70 |

2 |

Diagonals =

1 vertex Diagonals = n - 3

1 vertex Diagonals = 10 - 3

1 vertex Diagonals =

Triangles = N - 2

Triangles = 10 - 2

Triangles =