Answer
The area of the square = 256 mm²
Explanation
The question asks us to find the area of a square with perimeter of 64 mm.
Perimeter of a square = 4 × (Length of the square)
Let the length of the square be L
Perimeter = 4L
64 = 4L
4L = 64
Divide both sides by 4
(4L/4) = (64/4)
L = 16 mm
The length of the square is 16 mm.
But the area of a square is given as
Area = L²
Area = 16² = 256 mm²
Hope this Helps!!!