Perimeter of a square whose area is 25cm^2

20 cm

Step-by-step explanation:

First, find the length of one side of the square.  Here A = 25 cm^2 = s^2, where s represents that length.  Thus, s = 5 cm.

Next, find the perimeter of the square.  P = 2(length) + 2(width).  For a square, where length=width, P = 4s.

In this problem, P = 4(5 cm) = 20 cm

-2 is the right