Geometry Formula

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Ellipses are closed curves and are the bounded case of the conic sections, the curves that result from the intersection of a circular cone and a plane that does not pass through its apex; the other two (open and unbounded) cases are parabolas and hyperbolas. Ellipses arise from the intersection of a right circular cylinder with a plane that is not parallel to the cylinder's main axis of symmetry. Ellipses also arise as images of a circle under parallel projection and the bounded cases of perspective projection, which are simply intersections of the projective cone with the plane of projection. It is also the simplest Lissajous figure, formed when the horizontal and vertical motions are sinusoids with the same frequency. Wikipedia

Type any number into the fields, the other field will be calculated automatically.

Ellipse:

 

ellipse
Ellipse.
Major Radius = r1
   
Minor Radius = r2
   
Area (A):

\small \bold{\color{blue} A = \pi r_1 r_2}

   




Select first and second variable!

Variable 1:







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