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Name |
Area of Ellipse |
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Equation |
A
=
π
a
b
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Definition of terms |
A = area, a = semimajor axis, b = semiminor axis |
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Comments |
The are of an ellipse is equal to pi multiplied by the semimajor axis multiplied by the semiminor axis. In the special case that a and b are equal, the ellipse becomes a circle, and the familiar A = πr2 formula for the area of a circle results. |
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References
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CRC Standard Mathematical Tables , 26th edition, CRC, 1981
CRC Concise Encyclopaedia of Mathematics, E W Weisstein, Chapman & Hall / CRC, 1999 |
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