Okay so, (3+3) + (6+6) = 6+12)) that is 18m so the perimeter for the rectangle would be 18, the area would be 6x3 and that is 18m2!!
For the square,
Area would be 289ft2 since 17x17 is 289
Perimeter would be 68ft since 17x4 is 68!!
So basically area of a rectangle= L*W
And perimeter of a rectangle = 2 (w + h)
Then area of a square= s2
And perimeter of a square= 4 • s