(Jon of the Clue Crew shows a line segment sweeping out a circle on the monitor.)  Euclid's third postulate tells us that from any line segment, a circle can be drawn with one endpoint as the center & the segment itself as this line
It does not say that there is only one such line;... [DOC] [TLE] The Three Geometries - EscherMath [PAR] Nov 19, 2015 ... After giving the basic definitions he gives us five postulates.