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Circle

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.

Geometry and the Circle - Math Goodies

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 ...

Labeling parts of a circle | Area and circumference of circles | Khan ...

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.

The Circle and Parts of a Circle - eMathZone

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

Parts of a Circle: The radius of the circle is a straight line drawn from the center to the boundary line or the circumference. The plural of the word radius is radii.

Cool math .com - The Geometry of Circles - Radius, Diameter ...

www.coolmath.com/reference/circles-geometry

Definitions and formulas for the radius of a circle, the diameter of a circle, the circumference (perimeter) of a circle, the area of a circle, the chord of a circle, arc  ...

Circles: diameter, chord, radius, arc, tangent (with examples, videos ...

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

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

Basic information about circles (Geometry, Circles) – Mathplanet

www.mathplanet.com/education/geometry/circles/basic-information-about-circles

The points within the hula hoop are not part of the circle and are called interior ... The distance between the midpoint and the circle border is called the radius.

Area of Sectors and Segments of Circles - Regents Exam Prep Center

www.regentsprep.org/regents/math/geometry/gp16/circlesectors.htm

(Sectors are similar to "pizza pie slices" of a circle.) Semi-circle (half of circle = half of area). Quarter-Circle (1/4 of circle = 1/4 of area). Any Sector (fractional part  ...

Parts of Circles | CK-12 Foundation

www.ck12.org/book/CK-12-Basic-Geometry-Concepts/section/9.1/

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 circle below is point ...

IXL - Parts of a circle (4th grade math practice)

www.ixl.com/math/grade-4/parts-of-a-circle

Fun math practice! Improve your skills with free problems in 'Parts of a circle' and thousands of other practice lessons.

More Info

Parts of a circle - Pictorial index - Math Open Reference

www.mathopenref.com

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

Definitions of Parts of Circles - AlgebraLAB

www.algebralab.org

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 ...

Circle - Math is Fun

www.mathsisfun.com

circle. A circle is easy to make: Draw a curve that is "radius" away from a central point. And so: ... a Tangent. And a part of the circumference is called an Arc.