

A quadrilateral is a polygon with four edges (or sides) and four vertices or corners.
1. Square:
Area of a square = (side)2 = (diagonal)2 /2
Perimeter of the square = 4 * side
2. Rectangle:
Area of a rectangle = length * breadth
Perimeter of the square = 2(length + breadth)
3. Parallelogram:
Area of a parallelogram = base * height
4. Rhombus:
Area of rhombus = (Product of diagonals)/2
