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Yard and Square Yard – A Short Note
A yard is a unit of length used in the imperial and U.S. customary systems. One yard equals 3 feet or 36 inches, which is approximately 0.9144 meters. Yards are commonly used to measure longer lengths or distances, such as in sports fields, fabric measurements, or landscaping.
A square yard (written as yd²) is a unit of area. It represents the area of a square that is one yard (3 feet) on each side. One square yard equals 9 square feet or 1,296 square inches, and approximately 0.836 square meters. Square yards are often used to measure surfaces like carpeting, lawns, or large fabric areas.
In short, a yard measures how long something is, while a square yard measures how much surface area it covers. Understanding both is useful in construction, gardening, and textile industries.
Millimeter and Square Millimeter – A Short Note
A millimeter (symbol: mm) is a unit of length in the metric system, equal to:
1 millimeter = 10⁻³ meters (0.001 meters)
Millimeters are commonly used to measure small lengths and thicknesses in everyday life, such as the diameter of a pencil, the thickness of paper, or small machine parts.
A square millimeter (symbol: mm²) is a unit of area representing a square with sides one millimeter long:
1 mm² = (10⁻³ m) × (10⁻³ m) = 10⁻⁶ m²
Square millimeters are often used to measure surface areas in small objects, like the cross-sectional area of wires, small patches of skin, or the surface of tiny electronic components.
In summary:
Millimeter (mm) measures small lengths in daily life and engineering
Square millimeter (mm²) measures small areas on a scale larger than microscopic but still quite small
Commonly used in engineering, manufacturing, and medicine