The ellipse is a closed curve figure, where the sum of the distances from two fixed points (foci)
to every point on the curve is constant.
The foci are the two fixed points on the interior of an ellipse used in the formal definition of the ellipse.
Major Axis - longest diameter of an ellipse;
Minor Axis - shortest diameter of an ellipse;
Perimeter or circumference - total length of curve ellipse. For the most accurate calculation was adopted the formula of the Indian mathematician Ramanujan;
Area - the ellipse area;
Eccentricity - a measure of how close is from a circle curve;
Foci distance - distance between the foci of the ellipse;
Y/X ratio - Minor Axis / Major Axis, a height to width ratio. A measure of eccentricity. An ellipse whose ratio of the minor axis to the major is 1: 1 can be called the circle.
The planets describe elliptical orbits around the sun, which is located in a focus of the orbital ellipse, so, Perihelion is the closest point to the sun, while Aphelion is the furthest point.
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Right Triangle Isosceles Triangle Equilateral Triangle Scalene Triangle Square Rectangle Trapezium Right-Angled Trapezoid Isosceles Trapezoid Rhombus Regular polygon Polygon names Circle Pyramid Triangle pyramid Square pyramid Rectangular pyramid Cube Prism Rectangle Prism Cone Cylinder Sphere Ellipse Parabola Hyperbola