The area of a square is #81# #cm^2#. What is the perimeter of the square?
1 Answer
Mar 6, 2016
Perimeter = 36cm
Explanation:
The area of a square =
# l^2 #
where l is the length of the square's side.
#l^2 = 81 rArr l = sqrt81 = 9 # hence Perimeter =
#4xx9 = 36cm#
