 ### Face Angles of Convex Polyhedral Angle

Diagram used to prove the theorem: "The sum of the face angles of any convex polyhedral angle is less… ### Symmetrical or Equal Trihedral Angles

Diagram used to prove the theorem: "Two trihedral angles, which have three face angles of the one equal… ### Banner

Within the banner are floral arrangements made to look like bearded men. ### Capital in the Temple at Denderah

In some temples the pillars have, in lieu of capital, the face of a goddess, probably of Isis, with… ### Corinthian Capital

The structural tendency which prevails in the capitals of all orders to change from the circular form… ### Children in profile

Boy and girl looking toward the left. ### Corinthian Cornice

The Corinthian cornice is only distinguished from the Ionic by its mutules and modillions, which take… ### Cube

"A cube is a prism whose faces are ends are squares. All the faces of a cube are equal." —Hallock… ### 108 Stacked Congruent Cubes

Illustration of 108 congruent cubes stacked at various heights. A 3-dimensional representation on a… ### 117 Stacked Congruent Cubes

Illustration of 117 congruent cubes stacked in columns of one, four, and six. A 3-dimensional representation… ### 128 Stacked Congruent Cubes

Illustration of 128 congruent cubes stacked so they form a rectangular solid that measures 4 by 4 by… ### 132 Stacked Congruent Cubes

Illustration of 132 congruent cubes stacked in 22 columns of 6 in the shape of a U. A 3-dimensional… ### 154 Stacked Congruent Cubes

Illustration of 154 congruent cubes stacked in columns increasing from one to four. A 3-dimensional… ### 16 Stacked Congruent Cubes

Illustration of 16 congruent cubes stacked at various heights. A 3-dimensional representation on a 2-dimensional… ### 17 Stacked Congruent Cubes

Illustration of 17 congruent cubes stacked in ones and twos in the shape of a V. A 3-dimensional representation… ### 2 Congruent Cubes

Illustration of two congruent cubes that are tangent along an edge. A 3-dimensional representation on… ### 20 Stacked Congruent Cubes

Illustration of 20 congruent cubes stacked in twos and threes. A 3-dimensional representation on a 2-dimensional… ### 20 Stacked Congruent Cubes

Illustration of 20 congruent cubes stacked at various heights. A 3-dimensional representation on a 2-dimensional… ### 20 Stacked Congruent Cubes

Illustration of 20 congruent cubes stacked at heights increasing from 1 to 4 cubes. A 3-dimensional… ### 22 Stacked Congruent Cubes

Illustration of 22 congruent cubes stacked in ones, twos, and threes. A 3-dimensional representation… ### 22 Stacked Congruent Cubes

Illustration of 22 congruent cubes stacked at various heights. A 3-dimensional representation on a 2-dimensional… ### 24 Stacked Congruent Cubes

Illustration of 24 congruent cubes stacked at various heights to resemble steps. A 3-dimensional representation… ### 256 Stacked Congruent Cubes

Illustration of 256 congruent cubes stacked so they form 4 larger cubes that measures 4 by 4 by 4 each.… ### 27 Stacked Congruent Cubes

Illustration of 27 congruent cubes stacked to resemble a larger cube that measures three by three by… ### 27 Stacked Congruent Cubes

Illustration of 27 congruent cubes stacked at various heights in the shape of a W. A 3-dimensional representation… ### 28 Congruent Cubes Placed in the Shape of a Square

Illustration of 28 congruent cubes placed in the shape of a square. A 3-dimensional representation on… ### 30 Stacked Congruent Cubes

Illustration of 30 congruent cubes stacked in decreasing heights. A 3-dimensional representation on… ### 33 Stacked Congruent Cubes

Illustration of 33 congruent cubes stacked at various heights in a zigzag pattern. A 3-dimensional representation… ### 35 Stacked Congruent Cubes

Illustration of 35 congruent cubes stacked in ones and twos in the shape of a W. A 3-dimensional representation… ### 35 Stacked Congruent Cubes

Illustration of 35 congruent cubes stacked at various heights. A 3-dimensional representation on a 2-dimensional… ### 36 Stacked Congruent Cubes

Illustration of 36 congruent cubes stacked at various heights with outer edges forming a square. A 3-dimensional… ### 36 Stacked Congruent Cubes

Illustration of 36 congruent cubes stacked to resemble a 1 by 1 by 1 cube on a 2 by 2 by 2 cube on a… ### 39 Stacked Congruent Cubes

Illustration of 39 congruent cubes stacked at various heights. A 3-dimensional representation on a 2-dimensional… ### 4 Stacked Congruent Cubes

Illustration of 4 congruent cubes stacked in ones and twos. A 3-dimensional representation on a 2-dimensional… ### 50 Stacked Congruent Cubes

Illustration of 50 congruent cubes stacked at various heights. A 3-dimensional representation on a 2-dimensional… ### 56 Stacked Congruent Cubes

Illustration of 56 congruent cubes stacked in twos in the shape of a square. A 3-dimensional representation… ### 56 Stacked Congruent Cubes

Illustration of 56 congruent cubes stacked in heights of 1, 4, and 5 cubes that form a zigzag pattern.… ### 57 Stacked Congruent Cubes

Illustration of 57 congruent cubes stacked in heights of 1 and 5 cubes that form a zigzag pattern. A… ### 59 Stacked Congruent Cubes

Illustration of 59 congruent cubes stacked at various heights. A 3-dimensional representation on a 2-dimensional… ### 64 Stacked Congruent Cubes

Illustration of 64 congruent cubes stacked so they form a cube that measures 4 by 4 by 4. A 3-dimensional… ### 65 Stacked Congruent Cubes

Illustration of 65 congruent cubes stacked at heights increasing from 1 to 5 cubes. A 3-dimensional… ### Plane Bisecting Dihedral Angle

Diagram used to prove the theorem: "Every point in a plane which bisects a dihedral angle is equidistant… ### Flashcard of a Parallelogram

A flashcard featuring an illustration of a Parallelogram ### Flashcard of a polygon with eight equal sides

A flashcard featuring an illustration of a polygon with eight equal sides ### Flashcard of a polygon with eleven equal sides

A flashcard featuring an illustration of a polygon with eleven equal sides ### Flashcard of a polygon with five equal sides

A flashcard featuring an illustration of a polygon with five equal sides ### Flashcard of a polygon with four equal sides

A flashcard featuring an illustration of a polygon with four equal sides ### Flashcard of a polygon with four equal sides

A flashcard featuring an illustration of a polygon with four equal sides ### Flashcard of a polygon with four unequal sides

A flashcard featuring an illustration of a polygon with four unequal sides ### Flashcard of a polygon with nine equal sides

A flashcard featuring an illustration of a polygon with nine equal sides ### Flashcard of a polygon with seven equal sides

A flashcard featuring an illustration of a polygon with seven equal sides ### Flashcard of a polygon with six equal sides

A flashcard featuring an illustration of a polygon with six equal sides ### Flashcard of a Polygon with ten equal sides

A flashcard featuring an illustration of a Polygon with ten equal sides ### Flashcard of a polygon with three equal sides

A flashcard featuring an illustration of a polygon with three equal sides ### Flashcard of a polygon with twelve equal sides

A flashcard featuring an illustration of a polygon with twelve equal sides ### Flashcard of a Rectangle

A flashcard featuring an illustration of a Rectangle ### Flashcard of a Rhombus

A flashcard featuring an illustration of a Rhombus ### Flashcard of a Trapezoid

A flashcard featuring an illustration of a Trapezoid