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A square inch (plural: square inches) is a unit of area, equal to the area of a square with sides of one inch. The following symbols are used to denote square inches: *square in *sq inches, sq inch, sq in *inches/-2, inch/-2, in/-2 *inches^2, inch^2, in^2 *inches2, inch2, in2 or in some cases "^2 The square inch is a common unit of measurement in the United States and the United Kingdom. ==Equivalence with other units of area== 1 square inch (assuming an international inch) is equal to: (the overbars indicate repeating decimals) * square feet (1 square foot is equal to 144 square inches) * square yards (1 square yard is equal to 1,296 square inches) * square centimetres (1 square centimetre is equal to square inches) * square metres (1 square metre is equal to square inches) ja:インチ#平方インチ 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「square inch」の詳細全文を読む スポンサード リンク
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