How to find the perimeter of a quadrilateral

The quadrilateral is a geometric figure that has four sides and the same number of corners. Regardless of the types of quadrilaterals to calculate the perimeter, there is no single approach. But it has its own varieties, which are derived from the type of quadrilateral.

You will need

• To know all sides of the quadrangle.

Instruction

1. In order to calculate the perimeter of quadrilateral ABCD with sides AB, BC, CD and DA, we need to put together each of its sides:
   
   P = AB+BC+CD+DA, where
   
   P - perimeter of the quadrilateral.
2. If given a square with side a (a square has all sides are equal), then its perimeter will be calculated thus:
   
   P = 4*a.
   
3. If given a rectangle, or a parallelogram (they're both opposite sides are equal), then its area would be calculated as follows:
   
   P = 2*(a+b), where a and b are the sides of the rectangle/parallelogram.