 ### Star Inscribed In A Circle

Illustration of an 8-point star, or convex polygon, inscribed in a circle. This can also be described… ### Circle With Tangent and Secant

Circle with secant and tangent drawn. ### Circle With Tangent Line Drawn

Illustration of a circle with a tangent drawn - a straight line perpendicular to a radius at its extremity. ### Circle and Triangle

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

Circle with triangle and chords. ### Circle and Triangle

Circle with triangle and chords. ### Circle and Triangle

Circle with triangle and chords. ### Triangle Circumscribed About A Circle

Illustration of an equilateral triangle circumscribed about a circle. This can also be described as… ### Circle and Inscribed Triangle

Circle with triangle inscribed. ### Triangle Inscribed in Circle

Illustration of triangle inscribed in circle. Or, circle circumscribed about triangle. ### Triangle Inscribed In A Circle

Illustration of an equilateral triangle inscribed in a circle. This can also be described as a circle… ### Triangle Inscribed In A Circle

An illustration showing a triangle with sides b, c, and d inscribed in a circle with radius r. ### Triangle Inscribed In A Circle

An illustration showing a triangle with angles A, C, and D inscribed in a circle which is tangent to… ### 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 Two Intersecting Chords

Illustration of a circle with two intersecting chords within the circumference. The angle formed is… ### Circle With Two Tangents Drawn From an External Point

Illustration of a circle which illustrates that the tangents to a circle drawn from an external point… ### Circle With Unequal Chords

Illustration of a circle with unequal chords, which are unequally distant from the center. ### Unit Circle

Illustration of a unit circle (circle with a radius of 1) superimposed on the coordinate plane. The… ### Unit Circle Labeled At Quadrantal Angles

Illustration of a unit circle (circle with a radius of 1) superimposed on the coordinate plane with… ### Unit Circle Labeled At Special Angles

Illustration of a unit circle (circle with a radius of 1) superimposed on the coordinate plane with… ### Unit Circle Labeled At Special Angles

Illustration of a unit circle (circle with a radius of 1) superimposed on the coordinate plane with… ### Unit Circle Labeled In 30° Increments With Values

Illustration of a unit circle (circle with a radius of 1) superimposed on the coordinate plane with… ### Unit Circle Labeled In 45 ° Increments

Illustration of a unit circle (circle with a radius of 1) superimposed on the coordinate plane with… ### Unit Circle Labeled In 45° Increments With Values

Illustration of a unit circle (circle with a radius of 1) superimposed on the coordinate plane with… ### Unit Circle Labeled In 45° Increments With Values

Illustration of a unit circle (circle with a radius of 1) superimposed on the coordinate plane with… ### Unit Circle Labeled With Quadrantal Angles And Values

Illustration of a unit circle (circle with a radius of 1) superimposed on the coordinate plane. All… ### Unit Circle Labeled With Quadrantal Angles And Values

Illustration of a unit circle (circle with a radius of 1) superimposed on the coordinate plane with… ### Unit Circle Labeled With Quadrantal Angles And Values

Illustration of a unit circle (circle with a radius of 1) superimposed on the coordinate plane with… ### Unit Circle Labeled With Quadrantal Values

Illustration of a unit circle (circle with a radius of 1) superimposed on the coordinate plane. At each… ### Unit Circle Labeled With Quadrantal Values

Illustration of a unit circle (circle with a radius of 1) superimposed on the coordinate plane with… ### Unit Circle Labeled With Special Angles And Values

Illustration of a unit circle (circle with a radius of 1) superimposed on the coordinate plane with… ### Unit Circle Labeled With Special Angles And Values

Illustration of a unit circle (circle with a radius of 1) superimposed on the coordinate plane with… ### Unit Circle Labeled With Special Angles And Values

Illustration of a unit circle (circle with a radius of 1) superimposed on the coordinate plane with… ### Unit Circle Marked At Special Angles

Illustration of a unit circle (circle with a radius of 1) superimposed on the coordinate plane. All… ### Circle With Various Chords

Illustration showing a circle with various chords drawn. ### Circle With Various Chords

Illustration showing a circle with various chords drawn. ### Circle With Various Chords And Tangents

Illustration showing a circle with various chords and tangents drawn. ### Circle With Various Chords And Tangents

Illustration showing a circle with various chords and tangents drawn. ### Circle With Inscribed Equilateral Triangle

Illustration showing an equilateral triangle inscribed in a circle. ### Circle With Inscribed and Circumscribed Quadrilaterals

Illustration showing a circle with an inscribed and circumscribed quadrilateral. ### Circle With Inscribed Quadrilateral and Triangles Formed

Illustration showing a circle with an inscribed quadrilateral and triangles formed by extended chords. ### 12 Overlapping Circles About a Center Circle and Inside a Larger Circle

Circular rosette-like pattern made with 12 overlapping congruent circles tangent to a center circle… ### 2 Externally Tangent Circles

Illustration of two circles that are externally tangent to each other. ### 2 Internally Tangent Circles

Illustration of two circles that are internally tangent to each other. ### 24 Overlapping Circles About a Center Circle and Inside a Larger Circle

Circular rosette-like pattern made with 24 overlapping congruent circles tangent to a center circle… ### 3 Smaller Circles In A Larger Circle

A large circle containing 3 smaller congruent circles. The small circles are externally tangent to each… ### 3 Smaller Circles In A Larger Circle

A large circle containing 3 smaller congruent circles. The small circles are externally tangent to each… ### 4 Smaller Circles In A Larger Circle

A large circle containing 4 smaller congruent circles. The small circles are externally tangent to each… ### 4 Smaller Circles In A Larger Circle

A large circle containing 4 smaller congruent circles. The small circles are externally tangent to each… ### 48 Overlapping Circles About a Center Circle and Inside a Larger Circle

Circular rosette-like pattern made with 48 overlapping congruent circles tangent to a center circle… ### 5 Tangent Circles

A sequence of five circles tangent to each other at a point. The radius decreases by one half in each… ### 7 Smaller Circles In A Larger

A large circle containing 7 smaller congruent circles. The small circles are externally tangent to each… ### 7 Smaller Circles In A Larger Circle

A large circle containing 7 smaller congruent circles. The small circles are externally tangent to each… ### 7 Tangent Circles

7 congruent circles. 6 of the circles are equally placed about the center circle. The circles are externally… ### Circles With Angles Formed by Secants and Tangents

Illustration showing angles formed by two secants, two tangents, or a tangent and a secant, drawn to… ### Circumferences of 2 Circles

Illustration used to prove "If two circumferences meet at a point which is not on their line of centers,…