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 |
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