Two dimensional view of the cuts required to create the conic sections hyperbola, parabola, ellipse,…

Three dimensional representation of the intersecting planes required to create the conic sections hyperbola,…

Diagram of a cone with spheres and cut by a plane to depict the conic sections.

Diagram of a cone with inscribed spheres and cut by various planes to depict the conic sections: circle,…

Diagram showing how to construct a conic when given the focus and the auxiliary circle. If the focus…

Diagram showing how to construct a conic when given the focus and the auxiliary circle. The focus is…

Diagram showing how to construct a conic when given the focus and the auxiliary circle. As the focus…

An illustration of finding an intersection of a cone and cylinder by either cutting the vertex of the…

An illustration of finding an intersection of a cone and cylinder by either cutting the vertex of the…

Also known as Pseudotsuga menziesii. An evergreen conifer species found in western North America.

"An improved form of the lamp, in which a portion of the cone B is removed to show the two parallel…

Illustration showing an ellipse formed by the intersection of the surface of a cone with a plane neither…

Illustration showing the definition of an ellipse as a conic section. "The section of a right circular…

Illustration showing the definition of an ellipse as a conic section. "The section of a right circular…

Illustration showing the definition of an ellipse as a conic section. The plane cuts the cone obliquely.

Illustration showing the definition of an ellipse as a conic section. The section of a right circular…

An illustration showing the intersection of a plane and a cone. The cone is intersected by a plane neither…

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

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

Diagram that illustrates "The algebraic sum of the distances of any point from the foci of a conic is…

Diagram of an ellipse that can used to illustrate the different parts. Segment MN is the major axis,…

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

Also known as Picea engelmannii. A species of spruce tree native to western North America.

The most interesting monuments of Etruscan architecture which have been preserved are the tombs. They…

"A conical pin of hard wood, from 12 to 24 inches long, and from 1 to 3 inches in diameter at the butt,…

Also known as Abies fraseri. A species of fir native to the eastern United States mountains.

"The part of any solid between two planes, which may be either parallel or inclined to each other: as,…

A conically shaped utensil having a narrow tube at the small end; used to channel the flow of substances…

Also known as Abies grandis. A fir native to the Pacific Northwest and Northern California.

An illustration of the hemlock spruce's seed, cone, and foliage.

Illustration showing a hyperbola as a curve formed by the intersection of the surface of a cone with…

Diagram depicting a cone with both nappes intersected by plane J to form a hyperbola.

Illustration showing the definition of an hyperbola as a conic section. "The section of a right circular…

Illustration showing the definition of a hyperbola as a conic section.

Illustration showing the definition of an hyperbola as a conic section. A hyperbola is formed from a…

An illustration showing the intersection of a plane and a double cone. The cone is intersected by a…

Diagram showing how to construct a hyperbola when given the two foci and the length of the major axis…

Diagram part of a hyperbola with a tangent line that illustrates "A line through a point on the hyperbola…

Also known as Pinus taeda. The pine cone of a Southeastern United States pine tree.

Also known as Pinus contorta. The pine cone of a Lodgepole Pine tree, commonly found in western North…

Also known as Tsuga mertensiana. A species of hemlock native to the west coast of North America, between…

Also known as Abies nobilis. Native to the Cascade Range and Coast Range mountains.

"1. Norfolk Island Pine (Araucaria excelsa). 2. Cone of Araucaria Cookii."-Whitney, 1902

"An oblique cone connecting two parallel pipes of different diameters... the true size of the base is…