Units of length are standardized measures used to quantify distance or the extent of space between two points. Various systems exist for measuring length, including the metric system and the imperial system. Here are some common units of length from both systems: ### Metric System - **Millimeter (mm)**: One thousandth of a meter. - **Centimeter (cm)**: One hundredth of a meter. - **Meter (m)**: The base unit of length in the metric system.
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