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Decimeter

A decimeter (dm) is a unit of length in the metric system. It is equal to one-tenth of a meter, or 10 centimeters (1 dm = 0.1 m = 10 cm). While not as commonly used as centimeters or meters in everyday life, decimeters are still important in scientific and technical measurements. For example, a small book or a tablet might be about 2 to 3 decimeters long. The symbol for decimeter is "dm". Although it sits between the centimeter and meter in size, people often skip using decimeters and go directly from centimeters to meters. Still, it's a helpful unit when you need a mid-sized measurement.

Hectometer

A hectometer (hm) is a unit of length in the metric system, equal to 100 meters. It is larger than a meter but smaller than a kilometer. While it is part of the official metric system, the hectometer is rarely used in daily life or science. For example, a running track is 400 meters long, which is 4 hectometers. The symbol for hectometer is "hm". Although not commonly seen, it can be useful for measuring medium-range distances, especially when kilometers feel too large and meters too small.