Illustration of pattern showing steps to make a barn. The barn is a composite figure made up of a triangular…

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

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

An exercise problem in creating a development or rolled out surface of a cylinder in a 4" by 5" drawing…

Illustration of an oblique view of a hollow cylinder. The portion removed from the center of the cylinder…

Illustration of an elongated decagonal dipyramid that is formed by elongating a decagonal bipyramid…

Illustration of an elongated decagonal dipyramid that is formed by elongating a decagonal bipyramid…

Illustration of an elongated decagonal dipyramid that is formed by elongating a decagonal bipyramid…

Illustration of an elongated heptagonal/septagonal dipyramid that is formed by elongating a heptagonal…

Illustration of an elongated heptagonal/septagonal dipyramid that is formed by elongating a heptagonal…

Illustration of an elongated heptagonal/septagonal dipyramid that is formed by elongating a heptagonal…

Illustration of an elongated hexagonal dipyramid that is formed by elongating a hexagonal bipyramid…

Illustration of an elongated hexagonal dipyramid that is formed by elongating a hexagonal bipyramid…

Illustration of an elongated hexagonal dipyramid that is formed by elongating a hexagonal bipyramid…

Illustration of an elongated nonagonal dipyramid that is formed by elongating a nonagonal bipyramid…

Illustration of an elongated nonagonal dipyramid that is formed by elongating a nonagonal bipyramid…

Illustration of an elongated square dipyramid that is formed by elongating a square bipyramid by inserting…

Illustration of an elongated square dipyramid that is formed by elongating a square bipyramid by inserting…

A development or rolled out image exercise problem of the dome and finding the true shape of the hip,…

An illustration of a hexagonal prism rolled out, or "stretched out" in the straight line AB.

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…

Pattern that can be used to make a hollow rectangular prism. Development of hollow rectangular prism.

Illustration of pattern showing steps to make a house. The house is a composite figure made up of a…

A problem exercise creating a stretched out or developed image of the octagonal light shade by using…

Illustration showing the intersection of a plane with an octagonal prism.

Problem exercise in drawing a development or a stretchout image of the octagonal roof and finding the…

Diagram used to prove the theorem: "The opposite faces of a parallelopiped are equal and parallel."

Illustration of a parallelopiped with a plane passing through two diagonally opposite edges. The plane…

Illustration of a parallelopiped with a plane passing through two diagonally opposite edges. The plane…

Illustration of a parallelopiped (a prism with a parallelogram as its base) used to demonstrate that…

Diagram used to prove the theorem: "The rectangular parallelopipeds which have two dimensions in common…

Diagram used to prove the theorem: "The rectangular parallelopipeds are to each other as the product…

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

Diagram used to prove the theorem: "The volume of a rectangular parallelopiped is equal to the product…

Illustration of a prism - a polyhedron of which two faces are equal polygons in parallel planes, and…

An exercise developed to draw a rolled out or development of the pentagon prism in a 4" by 5" surface.

An exercise in drawing a pentagonal prism development or rolled out image in a 4" by 5" area.

An illustration to exercise a stretched out, or development, image of the triangular prism using 4"…

An illustration to draw triangle prism's development, or stretched out surfaces, in a 4" by 5" surface.

"...a tube with a slit at the further end through which the light enters, and at the other end a collimating…