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JEE Main 2026 Preparation: Question Papers, Solutions, Mock Tests & Strategy Unacademy » JEE Study Material » Mathematics » General Definition of Ellipse

General Definition of Ellipse

A consistent oval form drawn by a point traveling in a path such that the total of its distances from two adjacent points remains constant, or the result of cutting a cone with an oblique plane that does not meet the base.

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Ellipse is an individual from the conic area with highlights equivalent to a circle. An ellipse, aside from a circle, has an oval structure. An ellipse involves a set of foci with lengths under the same and the number of their spans from the ellipse’s two foci. The design resembles an egg in two ways and the running track on the inside of a playing field.

What exactly is an Ellipse?

In mathematics, the ellipse is a set of all ends together in-plane whose length from such a fixed point does have a constant ratio – ‘e’ towards the length from either a dedicated line (less than 1). An ellipse is for sure a part of the conic area, which would be framed when a cone crosses a plane that wouldn’t contact the lower part of the cone. Its center is assigned by S, the unchanged proportion [1] ‘e’ is known as eccentricity, and the line is referred to as the directrix (d) of an ellipse.

Definition 

An ellipse is a collection of points on a plane where lengths from two points add up to a set value. An ellipse’s two connecting points are referred to as foci.

An ellipse within the coordinate plane was represented algebraically using the generic equation about an ellipse.

The ellipse’s equation can be written as,

x2/a2 + y2/b2 = 1

Components of an Ellipse

Terms related to the different areas of the ellipse are:

Focus: F(c, o) and F’ (- c,0) are the places of two foci on the ellipse. Accordingly, the length between equivalents is comparable to 2c.

Major Axis: The width of an ellipse’s significant hub rises to 2a units, and also the completion point of such a major pivot; (a, 0), (- a, 0), correspondingly.

Centre: The center of the ellipse in the middle of the line connects the two focuses.

Minor Axis: The width of a minor ellipse approaches 2b units and the vertex of minor axis point; (0, b), and (0, – b), correspondingly.

Latus Rectum: It’s a line running opposite the ellipse’s cross and goes through to the circle’s midpoint. 2b2/an eventual width of the circle’s latus rectum.

Transverse Axis: A transverse axis would be the line that associates two foci and the ellipse’s middle.

Conjugate Axis: It’s a line that goes through the focal point of an ellipse, and it is opposite the cross-over hub.

Eccentricity (<1): The concentration distance from the ellipse’s middle separates the distance with one endpoint of the circle from the oval’s middle. If the center separation from the circle’s middle is ‘c,’ whereas the end line is ‘a’ eccentricity e=c/a.

An Ellipse’s Characteristics

A few properties separate an ellipse from other similar structures. These are the characteristics of an ellipse:

  1. An ellipse is framed when a plane crosses a cone at its base point.
  2. There are two foci or center focuses in each ellipse. The distances between any area on the ellipse and the two center focuses are equal.
  3. All ellipses have a middle and also a significant and minor axis.

Ellipses in Real-Life Situations

  • A lithotripter seems to be a healthcare device that uses elliptical reflectors that generate sound to diagnose and treat kidney diseases.
  • Ellipses can be used to depict the orbits of planets, orbits, satellites, and asteroids, as well as the forms of boat keels, thrusters, and also some aircraft wings.
  • You see a football figure when you rotate an Ellipse around its main axis.
  • According to Kepler’s first rule of planetary motion, every planet’s path is indeed an Ellipse with the Sun at one point.

Conclusion

An Ellipse is indeed the cluster of all locations in a plane in which the total of lengths between two points inside the plane is constant. These fixed points encompassed by curves are called foci (singular focus). An eccentricity of just an Ellipse is fixed, while the directrix is the fixed line. Eccentricity seems to be an Ellipse attribute that denotes elongation and is represented by symbol e.

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What's the meaning of an ellipse?

Whenever a plane traverses a cone at a right angle towards the base, it produces an ellipse. That’s a curve al...Read full

What are the different kinds of ellipses?

The horizontal long axis ellipse and thus the vertical major axis ellipse are indeed the two basic forms of ellipses...Read full

What did you notice about the ellipse?

There are two areas of focus, or foci, in every ellipse. The total distances between the two foci at each location o...Read full

What are some examples of how an ellipse is utilized in everyday life?

The orbits of planets, moons, satellites, & asteroids, as well as the forms of the boat, limps, thrusters, and s...Read full

Whenever a plane traverses a cone at a right angle towards the base, it produces an ellipse. That’s a curve along either end with 2 focus points. An ellipse is indeed a group of points with the same length among their foci.

The horizontal long axis ellipse and thus the vertical major axis ellipse are indeed the two basic forms of ellipses. The lines intersect the ellipse through the focus at two locations, the vertices. Whereas the main axis is indeed the straight path connecting the vertices, as well as its midway, it seems to be the ellipse’s center.

There are two areas of focus, or foci, in every ellipse. The total distances between the two foci at each location on the ellipse are indeed fixed. A center, as well as a major and minor axis, are found in all ellipses. Eccentricity values are more than or equal to zero and much less than one for all ellipses.

The orbits of planets, moons, satellites, & asteroids, as well as the forms of the boat, limps, thrusters, and some aviation wings, may all be represented by ellipses. Lithotripter, a medical device, generates sound waves to end things like kidney stones using elliptical reflectors.

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