Final answer:
The four most common metric units for length are: meter, kilometer, centimeter, and millimeter. Conversion factors can be used to convert between these units.
Step-by-step explanation:
The four most common metric units for length are:
- Meter (m) - the basic unit of length in the metric system
- Kilometer (km) - equal to 1000 meters, commonly used to measure long distances
- Centimeter (cm) - equal to one-hundredth of a meter, commonly used to measure smaller objects
- Millimeter (mm) - equal to one-thousandth of a meter, commonly used to measure very small objects
To convert between these units, you can use the following conversion factors:
- 1 kilometer = 1000 meters
- 1 meter = 100 centimeters
- 1 centimeter = 10 millimeters
Learn more about metric units for length