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Area | | Area: Encyclopedia - Area | | Area is a physical quantity expressing the size of a part of a surface. Surface area is the summation of the areas of the exposed sides of an object.
Area - Units.
Units for measuring surface area include:
square metre = SI derived unit
are = 100 square metres
hectare = 10,000 square metres
square kilometre = 1,000,000 square metres
square megametre = 1012 square metres
Imperial units, as currently defined from the metr ...
Including:
| | | Area, Area - Units, Area - Useful formulas | | |
| | | Area: Encyclopedia - Area
Area
Area is a physical quantity expressing the size of a part of a surface. Surface area is the summation of the areas of the exposed sides of an object.
Area - Units
Units for measuring surface area include:
square metre = SI derived unit
are = 100 square metres
hectare = 10,000 square metres
square kilometre = 1,000,000 square metres
square megametre = 1012 square metres
Imperial units, as currently defined from the metre:
square foot (plural square feet) = 0.09290304 square metres.
square yard = 9 square feet = 0.83612736 square metres
square perch = 30.25 square yards = 25.2928526 square metres
acre = 160 square perches or 43,560 square feet = 4046.8564224 square metres
square mile = 640 acres = 2.5899881103 square kilometres
Old European area units, still in used in some private matters (e.g. land sale advertisements)
square fathom = 3.5967 square metres
cadastral moon(acre) = 1600� square fathoms = 5755 square metres
The article Orders of magnitude links to lists of objects of comparable surface area.
Area - Useful formulas
- Area of a rectangle (and, in particular, a square): length × width
- Area of a triangle: ½ × base × height
- Area of a disk: π × r²
- Area of an ellipse: π × a × b
- Area of a sphere: 4 × π × r² = π × d²
- Area of a trapezoid: If a and b are the two parallel sides and h is the distance (height) between the parallels, the area formula is as below:
or
- Total surface area of a right circular cylinder: 2 × π × r × (h + r)
- Lateral surface area of a right circular cylinder: 2 × π × r × h
- Total surface area of a right circular cone: π × r × (l + r)
- Lateral surface area of a right circular cone: π × r × l
Other related archivesImperial units, Orders of magnitude, SI derived unit, a, acre, are, b, base, cadastral, d, disk, ellipse, fathom, foot, h, hectare, height, length, object, objects of comparable surface area, perch, quantity, r, rectangle, right circular cone, right circular cylinder, sphere, square, square metre, square mile, surface, trapezoid, triangle, width, yard, ½, π
 Adapted from the Wikipedia article "Area", under the G.N U Free Docmentation License. Please also see http://en.wikipedia.org/wiki |
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