Creating Data Points to compare relative distance

I am trying to map a series of data points that I have collected in a plot. I do not have Lat/Long for the points, because their location on the earth doesn't matter. I want to be able to analyze their spacial distribution relative to each other. The data points were collected from a circular plot, and for each point I have the distance of the point from the center of the circle and the angle of the point off of a major axis of the circle. I am having a hard time determining the best way to map the points. Everything I can see about importing data points into this program requires that the points have lat/long (either degree or decimal degree) coordinates.