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Decimeter and Square Decimeter – A Short Note

A decimeter (symbol: dm) is a unit of length in the metric system, equal to:

1 decimeter = 10⁻¹ meters (0.1 meters)

Decimeters are used to measure lengths that are larger than centimeters but smaller than a meter, such as the size of a small box or the length of a hand.

A square decimeter (symbol: dm²) is a unit of area representing a square with sides one decimeter long:

1 dm² = (0.1 m) × (0.1 m) = 0.01 m²

Square decimeters are commonly used to measure medium-sized surface areas, such as the area of a notebook page, a tile, or a small tabletop.

In summary:

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  Decimeter (dm) measures moderate lengths

  
  
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  Square decimeter (dm²) measures moderate areas

  
  
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  Used in everyday measurements, education, and practical applications

  
  

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.