Calculate the perimeter of a circle (of radius 'r') and a square (of side 'a').
2πr, 4a
πr, 4a
2πr, 2a
4πr, 4a
Consider 'r' as the radius of the circle and 'a' as the side length of the square. Then, Perimeter of circle = 2πr Perimeter of square = 4a