Smith, David Eugene, 1860-1944 · Boston, New York [etc.] Ginn and Company · leaf 221
210 THE TEACHING OF GEOMETRY … to Thales, being one of the few propositions with whichhis name is connected. It enables us to describe a circleby letting the arms of a carpenters square slide alongtwo nails driven in a board, a pencil being held at thevertex. A more practical use for it is made by machiniststo determine whether…
Geometry
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