Practice!

Sample Problem

A rectangle with perimeter 64 cm is made of 3 identical squares. What is the area of each square?

  cm2

Solution

The squares must be in a line to make a rectangular shape. If the side length of each square is x, then the length of the rectangle is 3x, and the width is x. Therefore, 8x is the perimeter of the rectangle, which we know is equal to 64. Clearly, x = 8. Then the area of each square is 8 × 8 = 64 cm2.