Smith, David Eugene, 1860-1944 · Boston, New York [etc.] Ginn and Company · leaf 254
e ofa book if no better means are athand. Then sight from some pointI), on CD, to P, putting a stakeat B. Then run the perpendicularBE. Since DE : EB = BA : . I P,and since we can measure DE,EB, and BA with the tape, we cancompute the distance A P. There are many variations of this scheme of… … 244 THE TEACHING OF GEOMETRY A very simple illustration of the use of similar trianglesis found in one of the stories told of Thales. It is re-
Geometry
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