Decagon Perimeter

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Decagon Perimeter Calculation:

  •  a =

    Length of a single side

  •  P =

    Perimeter of the decagon

  •

    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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Decagon Perimeter Formula

A decagon is a ten sided two-dimensional shape. Given the side length of a decagon the total perimeter will be ten times the side length.

P = 10 * a

Decagon Perimeter Formula
Finding the Perimeter of a Decagon

Decagon Perimeter Variables

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

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

Decagon Perimeter Solution

What is the perimeter of a decagon given a side length of 8?

  • p = 10 * a
  • Use the above formula to find the perimeter of the decagon
  • p = 10 * 8
  • Substitute in the known value
  • p = 80
  • Multiply the side length, eight, by the total number of sides, ten for a decagon
  • 72

A decagon with a side of 8 units will have a perimeter of 80 units.

Decagon Perimeter Example

If a decagon has a side of 12 inches what is the perimeter?

  • p = 9 * a
  • p = 9 * 12
  • p = 120
  • 120

A decagon with a side length of 12 inches has a perimeter of 120 inches, which we can also say is 10 feet using the inches to feet converter.

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Decagon Perimeter Formula