A decameter is a unit of length in the metric system, equal to ten meters. It is commonly used in fields such as agriculture and forestry to measure distances, such as the spacing between plants or the height of trees. The symbol for decameter is "dam." In the metric system, the decameter is part of a series of units that include the meter, centimeter, and kilometer. One decameter is equivalent to 100 centimeters or 0.01 kilometers. Understanding the decameter can help in converting measurements and comprehending larger distances in a more manageable way.