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Geometry Formula for Ellipse
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An ellipse is defined by two points, each called a focus. If we take any point on the ellipse, the sum of the distances to the focus points is constant. The size of the ellipse is determined by the sum of these two distances. The sum of these distances is equal to the length of the major axis (the longest diameter of the ellipse).
The area of an ellipse is A=pi ab.
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