### Circle

A circle and triangle situated on coordinate planes.

### Circle With Center o and Radius r with point P

Circle modeling the earth. O is the center of the earth, r the radius of the earth, and h the height…

### Circle with Chord and Triangle

Illustrations of a circle with a chord and triangle inside.

### Circle With Diameter, Radius, Segment, Line

Illustration showing a circle with a diameter, radius, lines, triangle, and segment drawn.

### Circle With Inscribed Angle Greater Than Semicircle

Illustration of a circle with an angle inscribed in a segment greater than a semicircle, an acute angle.

### Circle With Inscribed Angle Less Than Semicircle

Illustration of a circle with an angle inscribed in a segment less than a semicircle, an obtuse angle.

### Circle With Inscribed Right Angle in Semicircle

Illustration of a circle with a right angle inscribed in a semicircle.

### Circle With Triangles and Circle Within

Illustration showing a circle with equilateral triangles and another circle within.

### Circles With Radius 4000 and Enclosed Triangle

Illustration of circle with radius of 4000, and triangle with 45 degree angle enclosed.

### Star Inscribed In A Circle

Illustration of a 6-point star created by two equilateral triangles (often described as the Star of…

### Circle and Triangle

Circle with triangle to show how to divide a line in extreme and mean ratio.

### Circle and Triangles

Circle with triangles.

### Circle and Triangle

Circle with triangle and chords.

### Circle and Triangle

Circle with triangle and chords.

### Circle and Triangle

Circle with triangle and chords.

### Circle and Inscribed Triangle

Circle with triangle inscribed.

### Triangle Inscribed in Circle

Illustration of triangle inscribed in circle. Or, circle circumscribed about triangle.

### Circle With Inscribed Triangle and Radii

Illustration showing a circle with an inscribed triangle and radii.

### Circle and Triangles

Circle with two triangles.

### Triangles Making Up A Circle

Illustration showing that a circle may be considered as made up of triangles whose bases form the circumference.

### Circle With Inscribed Quadrilateral and Triangles Formed

Illustration showing a circle with an inscribed quadrilateral and triangles formed by extended chords.

### Circle With a Tangent Line and Chord

Illustration showing that from any point in the circumference of a circle, a chord and a tangent are…

### Two Intersecting Circles With Lines

Illustration showing 2 intersecting circles with a lines drawn that form a triangle.

### Compasses

"The compasses, next to the T square and triangles, are used more than any other instrument. A pencil…

### Compasses

"The compasses, next to the T square and triangles, are used more than any other instrument. A pencil…

### Compasses

"The compasses, next to the T square and triangles, are used more than any other instrument. A pencil…

### Compasses

"The compasses, next to the T square and triangles, are used more than any other instrument. A pencil…

### Compasses

"The compasses, next to the T square and triangles, are used more than any other instrument. A pencil…

### Compasses

"The compasses, next to the T square and triangles, are used more than any other instrument. A pencil…

### Composite Figure

Illustration of a figure made up of 4 smaller figures (triangles).

### Composite Figure

Illustration of a composite figure made up of rings, rectangles, triangles, etc..

### Cone

"If a cone be cut by a plane, parallel to the base, so as to form two parts, the lower part is called…

### Plane Passing Through the Vertex of a Cone

Illustration of a plane passing through the vertex of a cone (section made is a triangle).

### Plane Passing Through the Vertex of a Cone

Illustration of a plane passing through the vertex of a cone (section made is a triangle).

### Conic Sections 2D

Two dimensional view of the cuts required to create the conic sections hyperbola, parabola, ellipse,…

### Modern French Console

This modern French console has a front view like a pendant triangle.

### Renaissance Console

The Renaissance console is shaped in front-view like a pendant triangle. This console is found in a…

### Triangle With Circle Constructions

Illustration of a triangle with its incircle and three excircles constructed.

### Construction of a Triangle When Given Two Sides and the Angle Opposite (Ambiguous Case)

Illustration of the construction used to make a triangle when given two sides and the angle opposite…

### Construction of a Triangle When Given Two Sides and the Angle Opposite (Ambiguous Case)

Illustration of the construction used to make a triangle when given two sides and the angle opposite…

### Construction of a Triangle When Given Two Sides and the Angle Opposite (Ambiguous Case)

Illustration of the construction used to make a triangle when given two sides and the angle opposite…

### Construction of a Triangle Given Perimeter, Angle, Altitude

Illustration used to construct a triangle , given the perimeter, one angle, and the altitude from the…

### Positioning Pen for Constructions

Illustration showing the correct and incorrect position of a right line pen against a T-square, triangle,…

### Drawing Converging Lines

"Draw three-inch square. Draw lines AB, BC, DE and EF at 30 degrees. Divide lower side into seven equal…

### Triangular coop

"This triangular shape is a good one also for a movable poultry-house in its simplest form." —…

### Cormorant

Tangrams, invented by the Chinese, are used to develop geometric thinking and spatial sense. Seven figures…

### Cormorant

Tangrams, invented by the Chinese, are used to develop geometric thinking and spatial sense. Seven figures…

### Cormorant

Tangrams, invented by the Chinese, are used to develop geometric thinking and spatial sense. Seven figures…

### Cormorant

Tangrams, invented by the Chinese, are used to develop geometric thinking and spatial sense. Seven figures…

### Cup

Tangrams, invented by the Chinese, are used to develop geometric thinking and spatial sense. Seven figures…

### Cup

Tangrams, invented by the Chinese, are used to develop geometric thinking and spatial sense. Seven figures…

### Cup

Tangrams, invented by the Chinese, are used to develop geometric thinking and spatial sense. Seven figures…

### Cup

Tangrams, invented by the Chinese, are used to develop geometric thinking and spatial sense. Seven figures…

### Curve in Pavement of Road

Illustration of blueprint used by highway engineers to widen the pavement on the inside of the curve…

### Dancer

Tangrams, invented by the Chinese, are used to develop geometric thinking and spatial sense. Seven figures…

### Dancer

Tangrams, invented by the Chinese, are used to develop geometric thinking and spatial sense. Seven figures…

### Dancer

Tangrams, invented by the Chinese, are used to develop geometric thinking and spatial sense. Seven figures…

### Dancer

Tangrams, invented by the Chinese, are used to develop geometric thinking and spatial sense. Seven figures…

### Section Lining Device

A homemade section liner device made by slipping a wooden block to hold the triangle to make cross hatching…

### Diver

Tangrams, invented by the Chinese, are used to develop geometric thinking and spatial sense. Seven figures…