en.wikipedia.org/wiki/Circle

A **circle** is a simple closed shape. It is the set of all points in a plane that are at a
given distance ... two concentric **circles**. Arc: any connected **part** of the **circle**.

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 other inverse ...

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

Radius, diameter, center, and circumference--all are **parts of a circle**. Let's go
through each and understand how they are defined.

www.mathopenref.com/pictorialindex.html

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

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

The Circle and **Parts of a Circle**. The Circle. A circle is a plane curve consisting of
all points that have the same distance from a fixed point, called the center.

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.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.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 ...