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

Illustration of the method of finding the projection, in the form of an ellipse, of the top of a cylinder…

Illustration of the projection of a cylinder whose axis is parallel to the plane of the paper and makes…

Illustration of the projection of a hexagonal prism having two of its parallel sides parallel to the…

Illustration of the projection of a hexagonal prism whose axis is parallel to the plane of the paper…

Illustration of the projection of a hexagonal pyramid that is in a right position.

Illustration of the projection of a hexagonal pyramid that is obliquely inclined.

Illustration of a projection of an irregular surface upon a flat surface.

Illustration of an irregular surface abdc projected upon the flat surface ABCD.

Illustration of a line projection. If perpendiculars be drawn from the extremities of a line, as AB,…

Projections of a line inclined to both the horizontal and vertical planes will not show its true length,…

CD is the projection of AB upon OX. In each case AE=CD and AE=ABcos theta.

Illustration of the projection of a rectangular prism that is represented as if it were standing on…

Illustration of the projection of a rectangular prism whose broad side makes an angle of 30° with…

Illustration of the projection of a rectangular prism whose base makes an angle of 160° with the…

Illustration of the projection of a rectangular prism whose base makes an angle of 17.5° with the…

Illustration showing the development of a sphere by the perspective of its resolved cones.

Projections and development of a truncated cylinder.

Illustration of the projection of a wedge of a rectangular prism that is standing on one of its triangular…

Illustration of the projection of a wedge of a rectangular prism that is standing on one of its rectangular…

Illustration of the projection of a wedge of a rectangular prism that is viewed from the side.