Enter Octagon values

The of an octagon is
  

The area of an octagon is 20

Calculate side, perimeter

Calculate side:

s  =  2(1+√2)
  A

s  =  2(2.4142135623731)
  20

s  =  4.8284271247462
  20

s  =  2.1973682269356
  4.4721359549996

s = 0.49134647270262

Calculate Perimeter:

P = 8 x side

P = 8 x 0.49134647270262

P = 3.930771781621

Calculate Sum of the Interior Angles:

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

Interior Angle Sum = (8 - 2) x 180°

Interior Angle Sum = 6 x 180°

Interior Angle sum = 1080°

Calculate polygon diagonals

Diagonals  =  n(n - 3)
  2

Diagonals  =  8(8 - 3)
  2

Diagonals  =  8(5)
  2

Diagonals  =  40
  2

Diagonals = 20

Calculate 1 vertex diagonals:

1 vertex Diagonals = n - 3

1 vertex Diagonals = 8 - 3

1 vertex Diagonals = 5

Calculate triangles from one vertex:

Triangles = N - 2

Triangles = 8 - 2

Triangles = 6

Other Properties:

Sides (Edges) = 8

Faces = 1

Vertices = 8

Final Answers



A = 20
s = 0.49134647270262
P = 3.930771781621
Interior Angle sum = 1080°
Diagonals = 20
1 vertex Diagonals = 5
Triangles = 6
Sides (Edges) = 8
Faces = 1
Vertices = 8



What is the Answer?
A = 20
s = 0.49134647270262
P = 3.930771781621
Interior Angle sum = 1080°
Diagonals = 20
1 vertex Diagonals = 5
Triangles = 6
Sides (Edges) = 8
Faces = 1
Vertices = 8
How does the Octagon Calculator work?
Free Octagon Calculator - Calculate side, area, and perimeter of an octagon based on inputs
This calculator has 1 input.

What 1 formula is used for the Octagon Calculator?

P = 8*s

For more math formulas, check out our Formula Dossier

What 5 concepts are covered in the Octagon Calculator?

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
Example calculations for the Octagon Calculator

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