Illustration used to show that "In equal circles, or in the same circle, if two chords are equal, they…

Illustration used to show that "In equal circles, or in the same circle, if two chords are unequal,…

Illustration used to show that "In equal circles, or in the same circle, if two chords are unequal,…

Illustration used to show that "In equal circles, or in the same circle, if two chords are unequal,…

Circular rosette-like pattern made with 12 overlapping congruent circles tangent to a center circle…

2 congruent circles whose intersection includes a tangent circle with diameter equal to the radii of…

Illustration showing a circle with a radius of 2 in. intersecting a circle with a radius of 3 in..

A large circle containing 2 smaller congruent circles. The small circles are externally tangent to each…

A large circle containing 2 smaller congruent circles. The small circles are externally tangent to each…

Circular rosette-like pattern made with 24 overlapping congruent circles tangent to a center circle…

A large circle containing 3 smaller congruent circles. The small circles are externally tangent to each…

A large circle containing 3 smaller congruent circles. The small circles are externally tangent to each…

A large circle containing 4 smaller congruent circles. The small circles are externally tangent to each…

A large circle containing 4 smaller congruent circles. The small circles are externally tangent to each…

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

A sequence of five circles tangent to each other at a point. The radius decreases by one half in each…

A regular hexagon containing 7 congruent circles. The circles are externally tangent to each other and…

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

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

7 congruent circles. 6 of the circles are equally placed about the center circle. The circles are externally…

Illustration showing angles formed by two secants, two tangents, or a tangent and a secant, drawn to…

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

Illustration of concentric circles used to find area between two circles (ring).

"If AOB is an angle of 1 ° on the larger circle, it is also 1 ° on the smaller concentric circle,…

Illustration of three circles enclosed in an equilateral triangle.

Illustration of equal circles to show that two central angles have the same ratio as their intercepted…

An illustration depicting an infinite sequence of tangent circles with the radius converging to zero.…

Illustration of equal circles to show that an inscribed angle is measured by half the arc intercepted…

Illustration of a circle with a polygon (octagon) and square inscribed.

Illustration of intersecting circles. "If two circles intersect each other, the line joining their centers…

Illustration showing various circles and the angles formed by intersecting lines.

Illustration showing 2 intersecting circles with a line drawn through each point of intersection terminated…

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

Illustration of a circle with parallels intercepting equal arcs on a circumference.

Illustration of a 6-point star (convex dodecagon) inscribed in a large circle and circumscribed about…

Illustration of an 8-point star (convex polygon) inscribed in a large circle and circumscribed about…

Illustration of two circles that are tangent to each other, the line of center passing through the point…

Illustration of tangent circles. One circle is said to be tangent to another circle when they touch…

Illustration showing 2 circles with that touch each other and two lines drawn through the point of contact…

Illustration used to show how to pass a circumference through any three points not in the same straight…