In the United States, customary units of measurement are commonly used for various purposes, including everyday activities, trade, and commerce. Here are the main categories of customary units: ### Length - **Inch (in)**: 1 inch = 2.54 centimeters - **Foot (ft)**: 1 foot = 12 inches = 0.3048 meters - **Yard (yd)**: 1 yard = 3 feet = 36 inches = 0.
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