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Section


A section is a land measurement unit used in the United States Public Land Survey System (PLSS). It refers to a square area that is 1 mile on each side, covering:



  • 1 square mile



  • 640 acres



  • Approximately 2.59 square kilometers



Sections are the basic units within a township (which contains 36 sections) and are commonly used for legal land descriptions and property boundaries.


Circular Inch


A circular inch is a unit of area used primarily in engineering and wire gauge measurements. It represents the area of a circle with a diameter of one inch.



  • Formula: Area = π × (radius)²



  • Since the radius is half an inch,

    Area = π × (0.5 in)² = π × 0.25 in² ≈ 0.7854 square inches (in²).



Circular inches are often used to specify cross-sectional areas of wires or pipes.



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