Enter Octagon values

The of an octagon is
  

The area of an octagon is 18

Calculate side, perimeter

Calculate side:

s  =  √2(1+√2)
  √A

s  =  √2(2.4142135623731)
  √18

s  =  √4.8284271247462
  √18

s  =  2.1973682269356
  4.2426406871193

s = 0.51792465801001

Calculate Perimeter:

P = 8 x side

P = 8 x 0.51792465801001

P = 4.1433972640801

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 = 18
s = 0.51792465801001
P = 4.1433972640801
Interior Angle sum = 1080°
Diagonals = 20
1 vertex Diagonals = 5
Triangles = 6
Sides (Edges) = 8
Faces = 1
Vertices = 8


You have 2 free calculationss remaining



What is the Answer?
A = 18
s = 0.51792465801001
P = 4.1433972640801
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
  1. Octagon side = 1
  2. Octagon area = 1
  3. Octagon perimeter = 1
  4. Octagon side = 2
  5. Octagon area = 2
  6. Octagon perimeter = 2
  7. Octagon side = 3
  8. Octagon area = 3
  9. Octagon perimeter = 3
  10. Octagon side = 4
  11. Octagon area = 4
  12. Octagon perimeter = 4
  13. Octagon side = 5
  14. Octagon area = 5
  15. Octagon perimeter = 5
  16. Octagon side = 6
  17. Octagon area = 6
  18. Octagon perimeter = 6
  19. Octagon side = 7
  20. Octagon area = 7
  21. Octagon perimeter = 7
  22. Octagon side = 8
  23. Octagon area = 8
  24. Octagon perimeter = 8
  25. Octagon side = 9
  26. Octagon area = 9
  27. Octagon perimeter = 9
  28. Octagon side = 10
  29. Octagon area = 10
  30. Octagon perimeter = 10
  31. Octagon side = 11
  32. Octagon area = 11
  33. Octagon perimeter = 11
  34. Octagon side = 12
  35. Octagon area = 12
  36. Octagon perimeter = 12
  37. Octagon side = 13
  38. Octagon area = 13
  39. Octagon perimeter = 13
  40. Octagon side = 14
  41. Octagon area = 14
  42. Octagon perimeter = 14
  43. Octagon side = 15
  44. Octagon area = 15
  45. Octagon perimeter = 15
  46. Octagon side = 16
  47. Octagon area = 16
  48. Octagon perimeter = 16
  49. Octagon side = 17
  50. Octagon area = 17
  51. Octagon perimeter = 17
  52. Octagon side = 18
  53. Octagon area = 18
  54. Octagon perimeter = 18
  55. Octagon side = 19
  56. Octagon area = 19
  57. Octagon perimeter = 19
  58. Octagon side = 20
  59. Octagon area = 20
  60. Octagon perimeter = 20

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