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## Arc (geometry)

en.wikipedia.org/wiki/Arc_(geometry)

The length (more precisely, arc length), L, of an arc of a circle with radius r and subtending an angle \theta\,\!

## Cool math .com - The Trigonometry of Circles - arc length, area of a ...

www.coolmath.com/reference/circles-trigonometry

Definitions and formulas for the arc and the arc length of a circle, sector and the area of the sector of a circle, the unit circle, the angles on the unit circle in ...

## Circles and Arcs - RegentsPrep

www.regentsprep.org/regents/math/geometry/gp15/circlearcs.htm

In a circle, the length of an arc is a portion of the circumference. Remembering that the arc measure is the measure of the central angle, a definition can be ...

## Arc Length and Radian Measure - RegentsPrep

www.regentsprep.org/regents/math/algtrig/atm1/arclengthlesson.htm

(The arc length discussed on this page will be in relation to a circle.) An arc of a circle is a "portion" of the circumference of the circle. The length of an arc is ...

Feb 24, 2013 ... Visit www.doucehouse.com for more videos like this. In this video, I discuss 2 different ways of measuring arc length, by degrees and by ...

## Mathwords: Arc of a Circle

www.mathwords.com/a/arc_circle.htm

Arc of a Circle. A connected section of the circumference of a circle. Arcs are measured in two ways: as the measure of the central angle, or as the length of the ...

## Arc length -- Topics in trigonometry - The Math Page

www.themathpage.com/atrig/arc-length.htm

Now the circumference of a circle is an arc length. And the ratio of the circumference to the diameter is the basis of radian measure. That ratio is the definition of ...

## Geometry Calculating Arc Lengths - Math-Prof.com

www.math-prof.com/Geom/Geom_Ch_32.asp

The measure of the distance all of the way around a circle. is equal to the diameter times pi. That means the measure of the distance. half the way around the ...

## Definition of Arc Length - Math is Fun

www.mathsisfun.com/definitions/arc-length.html

The distance along the arc (part of the circumference of a circle, or of any curve). For a circle: Arc Length = θ × r (when θ is in radians) Arc Length = (θ × π/180) × ...

## How to Determine the Length of an Arc - For Dummies

www.dummies.com/how-to/content/how-to-determine-the-length-of-an-arc.html

An arc's length means the same commonsense thing length always means ... by 360°, you find the fraction of the circle's circumference that the arc makes up.

### Arc Length definition - Math Open Reference

www.mathopenref.com

Definition of arc length and formula to calculate it from the radius and central angle of ... Recall that 2πR is the circumference of the whole circle, so the formula  ...