In Questions 8–11, a rectangle is described. Some are possible and some are crazy. If a problem is possible, find the solution. If it is crazy, explain why.

  1. A square has an area of 36 centimeters. What is the perimeter?
  2. A square has a perimeter of 20 centimeters. What is the area?
  3. Three sides of a rectangle are 19 cm, 7 cm, and 18 cm. Find the area and perimeter of the rectangle.
  4. Two sides of a rectangle are 7.6 centimeters and 7.5 centimeters. Calculate the area and perimeter of the rectangle.
  5. Below is a green rectangle with a white rectangular hole. The area of the shaded part is 80 square centimeters. The white rectangle is 5 centimeters long, but someone spilled on the paper so you can't see its width.

    Use the following steps to find the width of the white rectangle.
    1. Find the area of the large rectangle.
    2. Find the area of the white rectangle.
    3. What is the length of the white rectangle?
    4. Find the width of the white rectangle.