Answer:
1) 1 1/2 ft.
2) 12 m.
3) 6 ft.
Step-by-step explanation:
1, 2) If the area is the same, then the sides are exactly half that of the surrounding square.
3) 9^2 = 81 ft^2 (or sqrt(81) = 9), if we take this 9 and subtract the 3 ft from it we will get the original side lengths.
