Illustration of a conical bifrustum created by three parallel planes of circles with the middle plane…

Illustration showing a circle formed by the intersection of a plane perpendicular to the axis of the…

Illustration showing the definition of a circle 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 parallel…

Illustration used to compare the volumes of a cone and a cylinder by emptying sand from the cone into…

Illustration of a right circular cone that has been cut by a plane parallel to the base. The lower part…

Illustration of a right circular cone that has been cut by a plane parallel to the base. The top section…

Illustration of a cone of revolution used to show that the lateral area is equal to half the product…

Development and top completion exercise problem of the cone by dividing the base into equal parts and…

Illustration of the development of a cone. When the cone covered in paper (figure a) is rolled out on…

Illustration of the development of a cone along a stretchout described with the radius OB.

Illustration of a frustum of a right circular cone with hidden edges shown. When a cone is cut by a…

Illustration of a frustum of a right circular cone. When a cone is cut by a plane parallel to the base,…

"The lateral area of a frustum of a cone of revolution is equal to half the sum of the circumferences…

"The volume of a frustum of a circular cone is equivalent to the sum of the volumes of three cones whose…

Illustration showing the intersection of a plane with a cone. The solid is shown in perspective and…

Possible forms of the invariable cone by means of the intersections with a concentric spherical surface.

Illustration showing a cone cut by a plane that is along the axis of symmetry.

Illustration of a plane parallel to the base passing through a cone (section made is a circle).

Illustration of a plane parallel to the base passing through a cone (section made is a circle).

Illustration of a plane passing through the vertex of a cone (section made is a triangle).

Illustration of a plane passing through the vertex of a cone (section made is a triangle).

Illustration of a pyramid and with a regular polygon inscribed in and circumscribed about a cone. "If…

Illustration of a right circular cone with the diameter of the base equal to the height of the cone.

Illustration of a right circular cone with the diameter of the base greater than the height of the cone.

Illustration of a right circular cone resting on an element such that the vertex is on the bottom and…

Illustration used to compare the volumes of a cone, a sphere, and a cylinder.

Illustration of a plane tangent to a cone which contains one element of the cone but does not cut the…

Illustration of a cone with a polygon inscribed used to show that the volume of a circular cone is equal…

A. A cone and two rods from the human retina (modified from Max Schultze); B. Outer part of rod separated…

An exercise problem to complete the top and develop, stretched out, image of the flange and hood cones…

"One end of the cup-adjusting hub, with inward bearings. The cones are formed of one piece with the…

An illustration showing a model of intersecting lines that that are formed by a double cone.

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

Illustration of a cone cut by a plane that is not parallel to the base and does not intersect the base.

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…