What is the area of a square with a perimeter of 64 mm

A = 256 mm^2

Step-by-step explanation:

The perimeter of a square is given by the formula

P = 4s where s is the length of a side

64 = 4s

Divide each side by 4

64/4 = 4s/4

16 = s

To find the area of a square, use the formula

A = s^2

A = 16^2

A = 256 mm^2