In that box we have 9 squares. One of the square has 1cm for all sides. That means the perimeter of one of the boxes is 4cm. For the 9 boxes, we have 4x 9= 36cm I think?

Ajala, your calculation is correct for the sum of the perimeters of 9 separate squares. Step 1: Verify the perimeter of one square. A square with 1 cm for all sides has a perimeter of 4 × 1 cm = 4 cm. Step 2: Calculate the sum of perimeters for 9 individual squares. If you add up the perimeters of 9 squares, each 4 cm, you get: 9 × 4 cm = 36 cm So, your calculation of 36 cm is correct if you are summing the perimeters of 9 individual, disconnected squares. However, when squares are placed together to form a larger shape (like "in that box"), the sides where they touch are no longer part of the outer perimeter of the combined shape. Step 3: Calculate the perimeter of the combined shape (assuming a 3 × 3 arrangement). If 9 squares, each 1 cm by 1 cm, are arranged to form a larger square (a 3 × 3 grid), the side length of this larger square would be: Side length = 3 × 1 cm = 3 cm The perimeter of this larger square is: P = 4 × Side length P = 4 × 3 cm P = 12 cm So, if the 9 squares form a larger 3 × 3 square, the perimeter of that larger shape is 12 cm. 3 done, 2 left today. You're making progress.