solve for the radius of an arc.

Discussion in 'Math' started by richbrune, Jul 29, 2006.

  1. richbrune

    Thread Starter Senior Member

    Oct 28, 2005
    106
    0
    I'd like to know the formula for finding the radius of an arc if you know the width of a segment of an arc, and the height of the segment, but you can't measure the whole circle.
    I can't figure out how to reduce the pixel size of a bitmap without freezing the computer, otherwise I'd send a diagram.
     
  2. hgmjr

    Moderator

    Jan 28, 2005
    9,030
    214
    Is this what you are looking for?

    http://mathworld.wolfram.com/CircularSegment.html

    hgmjr
     
  3. Nirvana

    Well-Known Member

    Jan 18, 2005
    58
    0
    Hi there, in order to determine the radius or length of an arc we use the formula. S = r θ, where s is the length of the arc, r is the length of the radius and θ is the angle the radius makes with the arc, in radians , so if you are using degrees then convert it in to radians.
    Hope That Helps

    Nirvana.
     
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