Perimeter of the rectangle = 2(length + breadth)

Perimeter of the square = 4*length of side of a square

Perimeter of the triangle = a + b + c

where a, b and c are the lengths of each side of the triangle.

Perimeter of the circle = circumference of the circle = 2πr

where r is the radius of the circle and π = 22/7 or 3.152