Illustration of 2 right rectangular prisms. The bases are congruent, but the height of the smaller prism…

Illustration of 2 Similar right octagonal prisms. The height and length of the edges of the smaller…

Illustration showing two prisms are equal if the three faces which include a trihedral angle of the…

Illustration of an oblique prism constructed by the combination of three truncated prisms.

Illustration of 2 similar right decagonal prisms. Both have regular decagons for bases and rectangular…

Illustration of 2 similar right heptagonal/septagonal prisms. Both have regular heptagons/septagons…

Illustration of 2 similar right hexagonal prisms. The height of the prism and length of the side of…

Illustration of 2 similar right hexagonal prisms. The height of the prism and length of the side of…

Diagram used to prove the theorem: "Two prisms are equal when the three faces about a trihedral of one…

Illustration used to compare the volumes of a pyramid and a prism by emptying sand from the pyramid…

A sample exercise problem in completing the top part of the hexagonal pyramid and to create a development,…

A sample exercise problem to complete the top part and create a stretched out image of the oblique hexagonal…

A pentagonal pyramid problem exercise to complete the top view of the image, and development, or rolled…

The problem exercise in completing the top view and creating the development, or rolled out, image of…

Illustration of the isometric of an oblique pentagonal pyramid.

Illustration of triangular pyramid used to show that the volume is the limit of the sum of the volumes…

Illustration of the development of a rectangular prism. "Assume now that the prism is laid on the drawing…

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 of a 5 in. by 3 in. by 4 in. rectangular solid with each cube in the solid representing…

Illustration of a 1 in. by 2 in. by 1 in. rectangular solid that is similar to a 2 in. by 4 in. by 2…

Illustration of an oblique view of a rectangular solid/prism at 30°.

Illustration of an oblique view of a rectangular solid/prism at 45°.

Illustration of an oblique view of a rectangular solid/prism at 60°.

Illustration of model created by combining non regular geometric solids.

"...an instrument which gives a spectrum when the source of the light is in a straight line with the…

Projection of a square bar with a cylindrical portion.

Illustration of stairs; 3-dimensional view of 4 steps. The staircase can be created by combining/stacking…

The exercise problem of creating a three piece elbow development or rolled out image of the cylinder…

Projections of a triangular prism or block with a square hole.

Diagram used to prove the theorem: "The volume of a triangular prism is equal to the product of its…

Diagram used to prove the theorem: "The plane passed through two diagonally opposite edges of a parallelopiped…

Exercise problem to develop, or rolled out, image of the triangular pyramid by creating an equal length…

Diagram used to prove the theorem: "The volume of a triangular pyramid is equal to one third of a triangular…

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.