www.mathopenref.com/arcradius.html

To calculate the radius. Given an arc or segment with known width and height:
Segment of a circle. A horizontal base line with an arc on the top. The formula for
...

www.handymath.com/cgi-bin/rad2.cgi?submit=Entry

Calculates the radius of an arc when the width and height of the arc are given.
The length of the arc and the angle subtended by the arc (not shown in figure)
are ...

www.had2know.com/academics/arc-radius-angle-formula-calculator.html

One of the most commonly encountered geometric problems involving arcs is
determining the radius of a circle that contains a given arc. A related problem in ...

www.1728.org/radians.htm

central angle calculator, arc length calculator, radius calculator, trigonometry.

www.ask.com/youtube?q=Calculate the Radius of an Arc&v=LKihdGwGNMM

May 14, 2015 ... How to find the radius of a circle given an arc length. ... Arch calculation for layout
(find radius, given span and depth of arch) - Duration: 16:15.

buildcalc.com/2011/07/how-do-i-calculate-the-diameter-or-radius-of-an-arc/

Jul 24, 2011 ... If you know two of the following about an arc, you can calculate the diameter or
radius for that arc. •Segment Height (rise); •Chord Length (run) ...

www.ajdesigner.com/phpcircle/circle_arc_length_r.php

Geometry calculator solving for circle radius given arc length and central angle.

www.ajdesigner.com/phpcircle/circle_arc_length_s.php

Geometry calculator solving for circle arc length given radius and central angle.

www.radiustrack.com/curved-right-custom-framing/radius-calculator

Purpose: To determine the linear footage (arc length) for a specific curved
application. For example, the calculator below can help you answer these
questions ...

math.stackexchange.com/questions/1274036/how-to-the-find-the-radius-of-a-sector

May 9, 2015 ... ... and the Arc Length but I'm not sure how to find out the radius of a circle? ...
Would you have to reverse the calculation to start from 15 15 ?