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

Illustration of a cone cut by a plane parallel to the axis of the cone and perpendicular to the vertical…

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…

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

Illustration of a cone cut by a plane that is parallel to one of the elements of the cone. The curve…

Illustration showing the definition of a parabola as a conic section. The plane cuts the cone parallel…

Illustration showing the definition of a parabola 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…

Diagram showing relations of the neurons and sensory epithelium in the retina. labels: E, epithelial…

Diagram of the structure of the human retina. Labels: I, pigment layer; II, rod and cone layer; R, rods;…

Also known as Pinus sylvestris. This image depicts the branchlet and cones of the Scots Pine.

Also known as Pinus sylvestris. The cones of this tree have a dense hue, and are between 1.5 inches…

Illustration showing intersecting straight lines meeting to form a triangle. It is formed by the intersection…

Projections and development of a truncated cylinder.

"The cone B would be developed by cutting a right section as S—S whose stretchout will be a circle…