(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
[DOC] [TLE] Download Book (PDF, 65484 KB) - Springer [PAR] Perseverance in this line of enquiry was made possible by the generous financial 
.... 1,200 times) to signify position on a circle, on a cycle of states.