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Area and Perimeter of a Pentagon

Calculate the area and perimeter of a regular pentagon shape. Includes the diagonal and the height length of the pentagon. In a regular pentagon all five sides are the same length and all five inside angles have the same size adding up to 540 degrees.

Area and Perimeter of a Pentagon

Area and Perimeter of a Pentagon

Select unit:
Side Length {{selectedunit.m1}}
decimal rounding # of digits in results


Pentagon Area {{selectedunit.m1}}²
Perimeter of Pentagon {{selectedunit.m1}}
Diagonal {{selectedunit.m1}}
Height {{selectedunit.m1}}


  1. enter the length of a side
  2. number of decimal places required in results


  1. area of the pentagon
  2. perimeter
  3. diagonal
  4. height

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