### Regular Pyramid With Pentagonal Base

Illustration of a regular pyramid with a pentagon for a base.

### Regular Pyramid With Square Base

Illustration of a regular pyramid with a square for a base.

### Spherical Pyramid

Illustration of a spherical pyramid.

### Square Pyramid

Plan, front, and side views of a square pyramid.

### Square Pyramid Revolved 30°

Plan, front, and side views of a square pyramid after revolving pyramid through 30° with vertical…

### Square Pyramid Revolved 30°

Plan, front, and side views of a square pyramid after revolving pyramid through 30° with horizontal…

### Triangular Pyramid For Volume

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

### Triangular Pyramid For Volume

Illustration of triangular pyramid used to show that the volume is equal to one third of the product…

### Pyramids

Illustration of 2 pyramids.

### 2 Right Pentagonal Pyramids

Illustration of 2 right pentagonal pyramids with hidden edges shown. The pentagonal bases are congruent,…

### 2 Right Rectangular Pyramids

Illustration of 2 right rectangular pyramids with hidden edges shown. The rectangular bases are congruent,…

### Equivalent Triangular Pyramids

Two triangular pyramids having equivalent bases and equal altitudes are equivalent.

### Pyramids With Pentagonal and Triangular Bases

Illustration of pentagonal and triangular pyramids cut by a plane parallel to the bases.

### Regular Pyramids

Illustration of 2 regular pyramids.

### Rhombic Pyramids

Illustration showing two rhombic pyramids.

### Similar Pentagonal Pyramids

Illustration of 2 similar right pentagonal pyramids with hidden edges shown. The height of the pyramid…

### Triangular Pyramids for Volume

Illustration showing that the volume of 2 triangular pyramids, having the same trihedral angle of the…

### Development Of Rectangular Prism

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

### Projection Of Rectangular Prism

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

### Projection Of Rectangular Prism

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

### Projection Of Rectangular Prism

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

### Projection Of Rectangular Prism

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

### Projections of Rectangular Prism

Projections of a rectangular prism or block.

### Volume Of A Rectangular Solid

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

### Similar Rectangular Solids

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…

### Bottom Half of a Regular Dodecahedron

Illustration of a the bottom half of a regular dodecahedron. A regular dodecahedron is a polyhedron…

### Projection of Round Bar

Projection of a round bar.

### Spherical Sector

Illustration of a spherical sector.

### Spherical Segments

Illustration of a spherical segments.

### Various Solid Forms

Illustration containing a tetrahedron, hexahedron, octahedron, dodecahedron, and icosahedron, placed…

### Irregular Solid With Triangular Surfaces

Illustration of an irregular solid form made up of triangular surfaces on a flat surface.

### Irregular Solid With Triangular Surfaces

Illustration of an irregular solid form made up of triangular surfaces unfolded on a flat surface. A…

### Irregular Solid

Illustration of an irregular solid form.

### Development Of Sphere

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

### Sphere Inscribed in a Cube

Illustration of a sphere inscribed in a cube.

### Sphere Inscribed in a Cube

Illustration of a sphere inscribed in a cube.

### Sphere Formed By Pyramids

Illustration showing that "the solids formed by the dissected part of the sphere are pyramids."

### Projection of Square Bar

Projection of a square bar.

### Projection of Square Bar With Cylindrical Portion

Projection of a square bar with a cylindrical portion.

### Volume Of Square Prism

Illustration used to show finding the volume of a square prism.

### Intersection of Square Pyramid and a Plane

Illustration of the intersection of a square pyramid and a plane.

### Intersection of Square Pyramid and a Plane

Illustration of the intersection of a square pyramid and a plane.

### Pattern for Tetrahedron

Pattern that can be cut out and folded to construct a regular tetrahedron. Fold on the dotted lines,…

### 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…

### Development Exercise of Cylinder using Three Piece Elbow

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

### Projections of Triangular Prism

Projections of a triangular prism or block.

### Projections of Triangular Prism With Hole

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

### Volume Of Triangular Prism

Illustration used to show finding the volume of a triangular prism.

### Volume of Triangular Prism

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

### Development Exercise of Triangular Pyramid

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

### Intersection of Triangular Pyramid and a Plane

Illustration of the intersection of a triangular pyramid and a plane.

### Volume of Triangular Pyramid

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

### Equivalent Triangular Pyramids

Diagram used to prove the theorem: "Two triangular pyramids having equivalent bases and equal altitudes…

### Triclinic

Illustration showing triclinic forms.

### Projection of Turned Block

Projection of a turned block.

### Intersection of Two Cones

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

### Projection Of Wedge

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

### Projection Of Wedge

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

### Projection Of Wedge

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