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Mile and Square Mile – A Short Note

A mile is a unit of length used mainly in the United States and the UK. One mile equals 5,280 feet or approximately 1.609 kilometers. It is commonly used to measure long distances, such as the length of roads, travel routes, or large-scale maps.

A square mile (written as mi²) is a unit of area. It represents the area of a square that is one mile on each side. One square mile equals 640 acres or approximately 2.59 square kilometers. It is often used to measure large land areas, such as cities, regions, or forests.

In summary, a mile measures distance (one-dimensional), while a square mile measures area (two-dimensional). The distinction is important in geography, land surveying, and transportation planning.

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