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Circle - Wikipedia


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.

Parts of a circle - Pictorial index - Math Open Reference


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

Labeling parts of a circle (video) | Khan Academy


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


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.

Circle - Math is Fun


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.

Basic information about circles (Geometry, Circles) – Mathplanet


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.

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


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

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


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  ...

Parts of a Circle - GeoGebra


Parts of a Circle. Use the Show/Hide buttons to discover the parts of a circle. Drag the points to change the question. Use the Show/Hide buttons to display the ...

Parts of a circle (7-W.13) - IXL.com


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Geometry and the Circle - Math Goodies


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 ...

Definitions of Parts of Circles - AlgebraLAB


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 ...

Area of a Segment in a Circle - Regents Exam Prep Center


(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  ...