The perimeter of an octagon is 15

Calculate side, area

s = | P |

8 |

s = | 15 |

8 |

s = **1.875**

A = 2(1+√2)side^{2}

A = 2(2.4142135623731)1.875^{2}

A = 4.8284271247462(3.515625)

A = **16.974939110436**

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

Interior Angle Sum = (8 - 2) x 180°

Interior Angle Sum = 6 x 180°

Interior Angle sum = 1080°

Diagonals = | n(n - 3) |

2 |

Diagonals = | 8(8 - 3) |

2 |

Diagonals = | 8(5) |

2 |

Diagonals = | 40 |

2 |

Diagonals = **20**

1 vertex Diagonals = n - 3

1 vertex Diagonals = 8 - 3

1 vertex Diagonals = **5**

Triangles = N - 2

Triangles = 8 - 2

Triangles = **6**

Sides (Edges) = **8**

Faces = **1**

Vertices = **8**

P = ** 15**

s =** 1.875**

A =**16.974939110436**

Interior Angle sum = 1080°

Diagonals =**20**

1 vertex Diagonals =**5**

Triangles =**6**

Sides (Edges) =**8**

Faces =**1**

Vertices =**8**

s =

A =

Interior Angle sum = 1080°

Diagonals =

1 vertex Diagonals =

Triangles =

Sides (Edges) =

Faces =

Vertices =

P = ** 15**

s =** 1.875**

A =**16.974939110436**

Interior Angle sum = 1080°

Diagonals =**20**

1 vertex Diagonals =**5**

Triangles =**6**

Sides (Edges) =**8**

Faces =**1**

Vertices =**8**

s =

A =

Interior Angle sum = 1080°

Diagonals =

1 vertex Diagonals =

Triangles =

Sides (Edges) =

Faces =

Vertices =

Free Octagon Calculator - Calculate side, area, and perimeter of an octagon based on inputs

This calculator has 1 input.

This calculator has 1 input.

- area
- Number of square units covering the shape
- octagon
- An eight (8) sided polygon

P = 8s - perimeter
- The distance around a shape or object
- polygon
- A plane figure bounded by a set of straight lines
- side
- line segment joining two vertices in a polygon also known as an edge

- Octagon side = 1
- Octagon area = 1
- Octagon perimeter = 1
- Octagon side = 2
- Octagon area = 2
- Octagon perimeter = 2
- Octagon side = 3
- Octagon area = 3
- Octagon perimeter = 3
- Octagon side = 4
- Octagon area = 4
- Octagon perimeter = 4
- Octagon side = 5
- Octagon area = 5
- Octagon perimeter = 5
- Octagon side = 6
- Octagon area = 6
- Octagon perimeter = 6
- Octagon side = 7
- Octagon area = 7
- Octagon perimeter = 7
- Octagon side = 8
- Octagon area = 8
- Octagon perimeter = 8
- Octagon side = 9
- Octagon area = 9
- Octagon perimeter = 9
- Octagon side = 10
- Octagon area = 10
- Octagon perimeter = 10
- Octagon side = 11
- Octagon area = 11
- Octagon perimeter = 11
- Octagon side = 12
- Octagon area = 12
- Octagon perimeter = 12
- Octagon side = 13
- Octagon area = 13
- Octagon perimeter = 13
- Octagon side = 14
- Octagon area = 14
- Octagon perimeter = 14
- Octagon side = 15
- Octagon area = 15
- Octagon perimeter = 15
- Octagon side = 16
- Octagon area = 16
- Octagon perimeter = 16
- Octagon side = 17
- Octagon area = 17
- Octagon perimeter = 17
- Octagon side = 18
- Octagon area = 18
- Octagon perimeter = 18
- Octagon side = 19
- Octagon area = 19
- Octagon perimeter = 19
- Octagon side = 20
- Octagon area = 20
- Octagon perimeter = 20

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