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 ...

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.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 ...

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.algebralab.org/lessons/lesson.aspx?file=Geometry_CircleDefinitions.xml

Introduction: A circle is all points equidistant from one point called the center of the circle. Segments drawn near and through the circle create other geometrical ...

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, ...

www.brightstorm.com/math/geometry/geometry-building-blocks/parts-of-a-circle

A chord is a line segment whose endpoints are on a circle. A diameter is a chord that passes through the center of a circle. Another one of the parts of a circle is ...

www.mathgoodies.com/lessons/vol2/geometry.html

A circle is an important shape in the field of geometry. Let's look at the definition of a circle and its parts. We will also examine the relationship between the circle ...