This mathematics ClipArt gallery offers 41 images of conic sections, or conics, in the shape of an ellipse. Conics are obtained by taking a cone, or conical surface, and intersecting it with a plane. Conic ellipses are retrieved when the intersecting cone and plane create a closed curve, except for the case where the plane that creates the closed curve is parallel to the plane of the circle created by the cone. In this case, a conic circle is created. ### Cone

Sections of a cone. a, parabola; b, ellipse; c, hyperbola. ### Conic Involution

The lines which join corresponding points in an involution on a conic all pass through a fixed point;… ### Ellipse

One of the three species of conic sections is the ellipse. ### Ellipse

Illustration of an ellipse with major and minor axes, foci, and points on the ellipse. "An ellipse is… ### Ellipse

Illustration showing an ellipse formed by the intersection of the surface of a cone with a plane neither… ### Corresponding Points in an Ellipse and Circle

Illustration of half of an ellipse. "The ordinates of two corresponding points in an ellipse and its… ### Construction of Ellipse by Describing Circles

Illustration used to draw a an ellipse using string and pins by describing a circles with diameters… ### Construction of Ellipse Using String

Illustration used to draw a an ellipse using string and pins. ### Area of an Ellipse

Illustration of half of an ellipse used to show that the area of an ellipse is equal to pi times a times… ### Conic Section Ellipse

Illustration of a cone cut by a plane that is not parallel to the base and does not intersect the base. ### Conic Section Showing an Ellipse

Illustration showing the definition of an ellipse as a conic section. "The section of a right circular… ### Conic Section Showing an Ellipse

Illustration showing the definition of an ellipse as a conic section. "The section of a right circular… ### Conic Section Showing Ellipse

Illustration showing the definition of an ellipse as a conic section. The plane cuts the cone obliquely. ### Conic Section Showing An Ellipse

Illustration showing the definition of an ellipse as a conic section. The section of a right circular… ### Conic Section Showing An Ellipse

An illustration showing the intersection of a plane and a cone. The cone is intersected by a plane neither… ### Conjugate Diameters of an Ellipse

Illustration showing that if one diameter is conjugate to a second, the second is conjugate to the first. ### Construction of an Ellipse

Illustration of half of an ellipse and its auxiliary circle used to construct an ellipse by points,… ### Construction Of An Ellipse

An illustration showing how to construct an ellipse. "With a as a center, draw two concentric circles… ### Construction Of An Ellipse

An illustration showing how to construct an ellipse using a string. "Having given the two axes, set… ### Construction Of An Ellipse

An illustration showing how to construct an ellipse using circle arcs. "Divide the long axis into three… ### Construction Of An Ellipse

An illustration showing how to construct an ellipse using circle arcs. "Given the two axes, set off… ### Construction Of An Ellipse

An illustration showing how to construct an ellipse. Given the two axes, set off half the long axis… ### Construction of Ellipse

Illustration used to draw a an ellipse with major axis AB and minor axis CD. ### Construction Of An Ellipse

Illustrations used to construct an ellipse. Fig. 59 shows a compass at C used to strike a circle. Where… ### Construction of an Ellipse

Diagram showing how to construct an ellipse when given the two foci and the length of the major axis… ### Definition of Ellipse

Diagram of an ellipse that can used to illustrate the definition. "The constant ration between the distances… ### Demonstration of Ellipse Definition

Illustration showing the definition of an ellipse. "An ellipse is a curve which is the locus of a point… ### Focal Radii of an Ellipse

Illustration of half of an ellipse. "If d denotes the abscissa of a point of an ellipse, r and r' its… ### Foci Distances on an Ellipse

Diagram that illustrates "The algebraic sum of the distances of any point from the foci of a conic is… ### Ellipse With Parts Labeled

Illustration of an ellipse with foci F' and F, major axis A' to A, minor axis B' to B, and center O. ### Line Bisecting Angle Between Focal Radii on Ellipse

Illustration of half of an ellipse. "If through a point P of an ellipse a line is drawn bisecting the… ### Ordinate and Major Axis of Ellipse

Illustration of half of an ellipse. The square of the ordinate of a point in an ellipse is to the product… ### Parallel Tangents to an Ellipse

Illustration showing that tangents drawn at the ends of any diameter are parallel to each other. ### Parts of Ellipse

Diagram of an ellipse that can used to illustrate the different parts. Segment MN is the major axis,… ### Point Distances to Foci on Ellipse

Illustration of half of an ellipse. "The sum of the distances of any point from the foci of an ellipse… ### Tangent From External Point to an Ellipse

Illustration of how to draw a tangent to an ellipse from an external point. ### Tangent to an Ellipse

Diagram an ellipse with a tangent line that illustrates "A line through a point on the ellipse and bisecting… ### Tangents to an Ellipse

Illustration showing the tangents drawn at two corresponding points of an ellipse and its auxiliary… ### Rolling of Equal Ellipses

"If two equal ellipses, each turning about one of its foci, are placed in contact in such a way that… ### Conic Foci Involution

The lines joining any point on a conic to the two foci are equally inclined to the tangent and normal… ### Construction Of An Isometric Ellipse

An illustration showing how to construct an isometric ellipse by compass and six circle arcs. "Divide…