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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:
Decimeter (dm) measures moderate lengths
Square decimeter (dm²) measures moderate areas
Used in everyday measurements, education, and practical applications
Centimeter and Square Centimeter – A Short Note
A centimeter (symbol: cm) is a unit of length in the metric system, equal to:
1 centimeter = 10⁻² meters (0.01 meters)
Centimeters are widely used to measure everyday objects like the length of a pencil, the width of a book, or the height of a small plant.
A square centimeter (symbol: cm²) is a unit of area that represents a square with sides one centimeter long:
1 cm² = (10⁻² m) × (10⁻² m) = 10⁻⁴ m²
Square centimeters are commonly used to measure surface areas of small objects, like the size of a photograph, a piece of fabric, or the area of a label.
In summary:
Centimeter (cm) measures lengths at a human-scale level
Square centimeter (cm²) measures areas of small to medium-sized surfaces
Used frequently in education, crafts, science, and everyday measurements