We can count the squares within the rectangle to answer this question. When we count the squares, there are squares that make up the rectangle.

You would use a ruler to measure a phone because a phone is most likely smaller than inches, which is the size of a ruler. The other tools are much larger. A yardstick can measure up to feet (or inches), and a meter stick is about the same size as a yardstick. Measuring tape can measure over feet.

A room is most likely larger than what a yardstick, meter stick, and ruler could measure. A ruler can only measure up to inches, a yardstick can only measure up to feet (or inches), and a meter stick is about the same size as a yardstick. Measuring tape can measure over feet.