Same & Different: Purple Rectangles

Look at the two pictures. What do you notice?

A: A rectangle 18 inches long. The width (w) is unknown.The Perimeter = 48 inches. B: A rectangle 15 inches long. The width (w) is unknown. Area = 90 square inches.
  1. How are pictures A and B mathematically the same, and how are they different?
    • A and B are the same because …
    • A and B are different because …
  2. Make a third figure with the dimensions labeled. Explain how your picture is the same as pictures A and B, and how it is different.