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Area From Wikipedia
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search This article is about the physical quantity. For other uses
see Area (disambiguation). Area is a quantity expressing the o-dimensional size of a defined part of a surface
typically a region bounded by a closed curve. The term surface area refers to the total area of the exposed surface of a 3-dimensional solid
such as the sum of the areas of the exposed sides of a polyhedron. Useful formulas 图片参考:upload.wikimedia/ *** /mons/thumb/b/b9/Area.svg/200px-Area.svg Common equations for area: Shape Equation Variables Square 图片参考:upload.wikimedia/math/9/e/f/9efae2c381598cd93b1e4c9a2dd1cd82 s is the length of the side of the square. Regular triangle 图片参考:upload.wikimedia/math/a/f/0/af0f6322f35f2a986ae7376e61885f75 s is the length of one side of the triangle. Regular hexagon 图片参考:upload.wikimedia/math/2/7/d/27d180f80dd0ef22e058da9ab919bf9a s is the length of one side of the hexagon. Regular octagon 图片参考:upload.wikimedia/math/5/5/b/55befe8b44add8938c4914ffe8e8babe s is the length of one side of the octagon. Any regular polygon 图片参考:upload.wikimedia/math/1/1/1/11161c479c1bda107ad57c941ca0a633 a is the apothem
or the radius of an inscribed circle in the polygon
and p is the perimeter of the polygon. Any regular polygon 图片参考:upload.wikimedia/math/7/e/9/7e9e79240c1bf87c55f90e2bd5324aff P is the Perimeter and n is the number of sides. Any regular polygon (using degree measure) 图片参考:upload.wikimedia/math/1/d/1/1d1e9343aca923b7bf1f93e5d3e5f0dd P is the Perimeter and n is the number of sides. Rectangle 图片参考:upload.wikimedia/math/0/b/8/0b85e50acaea901014da7871c8e193f9 l and w are the lengths of the rectangle"s sides (length and width). Parallelogram (in general) 图片参考:upload.wikimedia/math/7/1/8/718fdc368f8d614d7a93bc36ae7245d1 b and h are the length of the base and the length of the perpendicular height
respectively. Rhombus 图片参考:upload.wikimedia/math/c/3/8/c38e0e1c4ad81b19979335104d6e267a a and b are the lengths of the o diagonals of the rhombus. Triangle 图片参考:upload.wikimedia/math/f/6/a/f6a8a4ef1646892407d76f783257099a b and h are the base and altitude (measured perpendicular to the base)
respectively. Triangle 图片参考:upload.wikimedia/math/4/f/e/4fe3fc8bb778880038295c41e57bff95 a and b are any o sides
and C is the angle beeen them. Circle 图片参考:upload.wikimedia/math/5/a/9/5a9c98e8dda298f710272ed81b88008d r is the radius and d the diameter. Ellipse 图片参考:upload.wikimedia/math/e/e/c/eec18db3c5fedb7eba42db3557880902 a and b are the semi-major and semi-minor axes
respectively. Trapezoid 图片参考:upload.wikimedia/math/1/b/2/1b2806ec4e2fb163e65f1da175fa00de a and b are the parallel sides and h the distance (height) beeen the parallels. Total surface area of a Cylinder 图片参考:upload.wikimedia/math/0/6/2/06297123f345d77ab7e82c8bedfe15e1 r and h are the radius and height
respectively. Lateral surface area of a cylinder 图片参考:upload.wikimedia/math/2/d/9/2d96b91c66569fdb915faeef48cb0aef r and h are the radius and height
respectively. Total surface area of a Cone 图片参考:upload.wikimedia/math/0/4/6/046012647b8da9f10ff3b4ce6bfb55ff r and l are the radius and slant height
respectively. Lateral surface area of a cone 图片参考:upload.wikimedia/math/5/e/7/5e7da0b843a577bbc0f22c8d61297952 r and l are the radius and slant height
respectively. Total surface area of a Sphere 图片参考:upload.wikimedia/math/9/d/8/9d862a6169e42e7026ab4831fd7a6868 r and d are the radius and diameter
respectively. Total surface area of an ellipsoid See the article. Circular sector 图片参考:upload.wikimedia/math/f/7/a/f7a78fb9bb8282a8caab10e6dec49b9e r and θ are the radius and angle (in radi)
respectively. Square to circular area conversion 图片参考:upload.wikimedia/math/6/a/8/6a80d9aae6792c9afd51f59b9fb51a2d A is the area of the square in square units. Circular to square area conversion 图片参考:upload.wikimedia/math/7/3/a/73a0bb638708486a13a6db0a32e5779c C is the area of the circle in circular units.
参考: en. *** /wiki/Area