An Ellipse is a plane curve that results from the intersection of a cone by a plane that produces a closed curve. An ellipse is a locus of points in a plane such that the sum of the distances to two fixed points is a constant.
Area of Ellipse = πr1r2
Volume of Ellipse = (4/3) πr1r2r3
Perimeter of Ellipse = 2πSqrt ((r1² + r2²) / 2)
r1, r2 and r3 = radii