

1. Rectangle:
Let l is the length and b is the breadth of the rectangle.
Perimeter of the rectangle = 2(length + breadth)
= 2(l + b)
Area of the rectangle = length * breadth
= l * b
2. Square:
Let a is the length of the side of the square.
Now, perimeter of the square = 4 * length of side
= 4a
Area of the square = (side)2
= a2
