Smith, David Eugene, 1860-1944 · Boston, New York [etc.] Ginn and Company · leaf 199
188 THE TEACHING OF GEOMETRY It would have been possible for Thales, if lie knewthis proposition, to have measured the distance of theship at sea by some such device as this: Make a large isosceles triangle out of wood, and, standing atT, sight to the ship and along the shore on a line TA} using…
Geometry
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