Octagon Perimeter

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Octagon Perimeter Calculation:

  •  a =

    Length of a single side

  •  P =

    Perimeter of the octagon

  •

    Choose the number of decimals to show in your answer. This is also known as significant figures. Select an appropriate amount of significant figures based on the precision of the input numbers.

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Octagon Perimeter Formula

An octagon is an eight sided two-dimensional shape. Given the side length of an Octagon the total perimeter will be eight times the side length.

P = 8 * a

Octagon Perimeter Formula
Finding the Perimeter of an Octagon

Octagon Perimeter Variables

The length of one side is required to find the perimeter.

Side (a)
Length of one side of the octagon.
Perimeter (P)
Total perimeter of the octagon.

Octagon Perimeter Solution

What is the perimeter of an octagon given a side length of 8?

  • p = 8 * a
  • Use the above formula to find the perimeter of the octagon
  • p = 8 * 8
  • Substitute in the known value
  • p = 64
  • Multiply the side length, eight, by the total number of sides, eight for an octagon
  • 64

An octagon with a side of 8 units will have a perimeter of 64 units.

Octagon Perimeter Example

If an octagon has a side of 16 inches what is the perimeter?

  • p = 8 * a
  • p = 8 * 16
  • p = 128
  • 128

An octagon with a side length of 16 inches has a perimeter of 128 inches, which we can also say is 10 and two-thirds feet using the inches to feet converter.

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Octagon Perimeter Formula