 ### 2 Similar Right Circular Cones

Illustration of 2 right circular cones that are similar. ### 2 Narrow Cylinders on Their Sides

Illustration of 2 narrow right circular cylinders with equal heights (thickness) and different diameters.… ### 2 Right Circular Cylinders

Illustration of 2 right circular cylinders in which one cylinder is twice the height of the other. ### 2 Right Circular Cylinders

Illustration of 2 right circular cylinders in which one cylinder is twice the height and twice the diameter… ### 2 Similar Cylinders

Illustration of 2 similar cylinders. The height and diameter of the smaller cylinder is half that of… ### 2 Soup Can Cylinders

Illustration of 2 soup cans that are similar cylinders. The diameter and height of the smaller can is… ### 3 Similar Cylinders

Illustration of 3 similar cylinders. The height and diameter in each successively smaller cylinder is… ### 3 Similar Cylinders

Illustration of 3 similar cylinders. The height and diameter in each successively smaller cylinder is… ### 2 Concentric Decagons

Illustration of 2 regular concentric decagons. ### 2 Concentric Decagons

Illustration of 2 regular concentric decagons. ### 3 Concentric Decagons

Illustration of 3 regular concentric decagons that are equally spaced. ### 4 Concentric Decagons

Illustration of 4 regular concentric evenly spaced decagons. ### Pyramid Cut By Plane

Diagram used to prove the theorem: "If a pyramid is cut by a plane parallel to the base, the edges are… ### Similar Polyhedrons

Two similar polyhedrons may be decomposed into the same number of tetrahedrons similar, each to each,… ### Two Similar Polyhedrons

Diagram used to prove the theorem: "Two similar polyhedrons may be decomposed into the same number of… ### Similar Tetrahedrons

The volumes of two similar tetrahedrons are to each other as the cubes of their homologous (corresponding)… ### Two Proportional Tetrahedrons

Diagram used to prove the theorem: "Two tetrahedrons having a trihedral angle in each equal, are to…