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en.wikipedia.org/wiki/Circular_segment

In geometry, a circular segment (symbol: ⌓) is a region of a circle which is "cut off" from the rest ... The angle thus inscribed is θ/2 and is part of a right triangle whose hypotenuse is the diameter. This is also useful in deriving some of the ...

en.wikipedia.org/wiki/Circle

A circle is a simple closed shape in Euclidean geometry. It is the set of all points in a plane that ... by two concentric circles. Arc: any connected part of the circle.

www.khanacademy.org/math/basic-geo/basic-geo-area-and-perimeter/area-circumference-circle/v/parts-of-a-circle

The center of a circle is the point at which the distance to any part on the circle is exactly the same distance. The center is at the middle of the diameter and ...

www.mathopenref.com/pictorialindex.html

A pictorial index to the parts of a circle. A diagram with links to full definitions.

www.ck12.org/geometry/Parts-of-Circles/lesson/Parts-of-Circles-BSC-GEOM

Feb 24, 2012 ... Circles. A circle is the set of all points in the plane that are the same distance away from a specific point, called the center. The center of the ...

www.brainfuse.com/jsp/alc/resource.jsp?s=gre&c=37818&cc=108830

Parts of a Circle. A circle is a set of all points in a plane that are all an equal distance from a single point, the center. The distance from a circle's center to a point ...

www.emathzone.com/tutorials/geometry/the-circle-and-parts-of-a-circle.html

An arc is a part of the circumference between two points or a continuous piece of a circle. The shorter arc between P and Q is called the minor arc PQ. The ...

www.mathsisfun.com/geometry/circle.html

radius diameter circumference: circle/diameter = pi = 3.14159... The Radius is the distance from ... And a part of the circumference is called an Arc. circle slices ...

nextlevelmaths.com/resources/other_resources/parts_of_a_circle

Learn all the important names for parts of circle geometry.

www.onlinemathlearning.com/diameter-of-circle.html

Parts of a Circle - Diameter, Chord, Radius, Arc, Tangent, Intersecting Circles, Internal and External Tangents with examples, step by step solutions, definitions,  ...