
Square Millimeters to Square Meters Conversion (sq mm to sq m)
Square meter. The square meter is the SI-derived unit of area. It has a symbol m² (33A1 in Unicode [1] ). It is defined as the area of a square whose sides measure exactly one meter. The square meter is derived from the SI base unit of the meter, which in turn is defined as the length of the path travelled by light in absolute vacuum during a.
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