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Foot and Square Foot – A Short Note
A foot is a unit of length in the imperial and U.S. customary systems. One foot is equal to 12 inches or approximately 30.48 centimeters. It is commonly used to measure height, length, or distance—such as a person's height, the length of a room, or the size of an object.
A square foot (written as ft²) is a unit of area. It represents a square that is one foot long and one foot wide. One square foot is equal to 144 square inches or approximately 0.093 square meters. It is widely used in real estate, architecture, and construction to measure floor space, land area, or surface coverage.
In simple terms, a foot measures how long something is, while a square foot measures how much space it covers. Knowing the difference is essential when dealing with both length and area in everyday tasks or professional work.
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:
Decimeter (dm) measures moderate lengths
Square decimeter (dm²) measures moderate areas
Used in everyday measurements, education, and practical applications