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unit of measure: the base unit | the supplementary unit | the derived unit

*geometry: the area of a flat figure | the area of a solid | the volume of the solid*

The ** ellipse** is a plane curve defined as the geometrical locus of the points for which the sum of distances to two fixed points, called also as focal points of the ellipse, is constant.

The ellipse is a conic, that is, it is one of the curves that can be obtained by intersection of a cone and a plane.

The ** area of an ellipse** is equal to the product of the values of π and it’s a and b semi-axes.

where:

a — the major semi-axis of ellipse;

b — the small semi-axis of ellipse.

*For separation of number integers and decimals, use the symbol – point [.]*

context information: contemporary and archaic unit of measurement of area