consider a circular plate with radius R , with three points on it at arbitrary coordinates on the plate area that form a triangle. Just imagine 3 holes on the plate area

If I can have the new coordinates of these 3 points when the circular plate translates and rotates in space, how can I find the new coordinates of the circle plate center in space ?

  • $\begingroup$ Three points determine a circle, but not a disk. Any disk containing the circle that is determined by the points would contain the points. $\endgroup$ – ajotatxe Jun 6 at 15:13
  • $\begingroup$ No , I corrected the question, these 3 points do not necessary always fall on one circle, they are holes in the disk area $\endgroup$ – FabioSpaghetti Jun 6 at 15:14

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