Units of Length

This lecture series introduces the units of length (or distance) in the metric and U.S. customary systems. Watch the videos and complete the interactive exercises.

Practice

Estimating length (in, ft, yd, and mi) - Answers

1. The height of a giraffe is about 5 yards.

2. Feet is the most reasonable unit to measure the height of an adult.

3. The distance traveled on an hour long hike is about 2 miles.

4. Miles is the most reasonable unit to measure the distance of an airline flight.

5. Yards is the most reasonable unit to measure the length of an Olympic size swimming pool.

6. The length of a notebook is about 10 inches.

7. The length of an Orca whale is about 30 feet.