Write the formula for finding the perimeter P of a square with side 'a' units. What is the subject in this formula?

Write the formula for finding the circumference (C) of a circle with radius r units. What is the subject in this formula?

Find the perimeter of a square of side 5 cm

Find the perimeter of a square whose side is 5cm.

Find the perimeter of a square whose side is 5cm.