The Klein Disk is a non-conformal model of the hyperbolic plane. Later it was discovered that Beltrami independently had discovered this model.[br][br]A couple experiments for which you can use this:[br]-see how distance works on the disk by moving P & Q[br]-investigate a Klein circle by tracing Q and trying to keep the distance constant.[br]-turn on the 3rd point and try to make an equilateral triangle[br]-turn on the perpendicular through R to AB to investigate right angles in this model