Diameter of a circle using 3 nonlinear points I am trying to find the diameter of a circle using 3 points on its circumference.  2 of the points are 5 feet from eachother while the third point is centered between the other 2.  The ceter point is 1 foot from a line drawn between the other 2 points.

Alternatively you may use of following property:
"The circumcenter of a triangle can be found as the intersection of any two of the three perpendicular bisectors."
Adjust your figure accordingly and search for similar triangles.
