Sagot :
I Think mm = Is To Inches so area perimiter is preseted with the area's perimiter if you got a 12mm ruler you can place on a area that is on a wall to reposite the perimiter :)
by finding the perimeter of square
s+s+s+s=n s=side
by finding the area of square
sxsxsxs s=side
s+s+s+s=n s=side
by finding the area of square
sxsxsxs s=side