Find centre of circle

  • Thread starter bikermart
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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
 

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  • #2
Hootenanny
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Welcome to Physics Forums.
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
One can simply use the general equation for a circle in Cartesian coordinates.
 
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which is ?
 
  • #5
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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.
 
  • #6
Hootenanny
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thats great thanks but that give me two simultaneous equations to work out.
Indeed it does. But they are not difficult.
 

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