(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
This in itself is not physics, because the points, lines, and circles, 
... of the radius of the Earth, for example, although he has no idea how it was... [DOC] [TLE] Color [PAR] Jun 13, 2013 ... One of the key requirements of the Common Core State Standards ... the Lines 
that showed which skills differentiated those stu- ..... Few, if any, authentic texts 
will be low or high on all of these ...... As the narrator tells us, ... them to follow 
imagined parallel lines of latitude that circle the globe.