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Find centre of circle

  1. Oct 6, 2011 #1
    given the x,y coordinates of two points and the radius of a curve. has anyone got a formula for calculating the coordinates of the centre point please
     
  2. jcsd
  3. Oct 6, 2011 #2

    Hootenanny

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    Welcome to Physics Forums.
    One can simply use the general equation for a circle in Cartesian coordinates.
     
  4. Oct 6, 2011 #3
    which is ?
     
  5. Oct 6, 2011 #4

    Hootenanny

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  6. Oct 6, 2011 #5
    thats great thanks but that give me two simultaneous equations to work out.
    i might be being lazy here but has anyone trawled out the formula such that given x1,y1,x2,y2 and r then a= and b= so i can just stick them in my program.
    cheers.
     
  7. Oct 6, 2011 #6

    Hootenanny

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    Indeed it does. But they are not difficult.
     
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