Perimeter Formulas

A perimeter means the distance of the boundary of a two-dimensional shape. Also, it is defined as the sum of the length of all the sides of the object. The algebraic sum of the length of each side is the perimeter of that shape. We have formulas available for the various shapes in geometry.

Below are the formulas for perimeter of different 2d shapes.

Geometric Shape Perimeter Formula Metrics
Parallelogram 2(Base + Height)
Triangle a + b + c a, b and c being the side lengths
Rectangle 2(Length + Width)
Square 4a a =Length of a side
Trapezoid a + b + c + d a, b, c, d being the sides of the trapezoid
Kite 2a + 2b a = Length of the first pair
b = Length of the second pair
Rhombus 4 x a a  = Length of a side
Hexagon 6 x a a  = Length of a side


  1. Eke Emmanuel Ndubisi

    Great site indeed !!

  2. Thank with this I helped my little nephew

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