Smith, David Eugene, 1860-1944 · Boston, New York [etc.] Ginn and Company · leaf 299
288 THE TEACHING OF GEOMETRY Here the circles B are tangent to the circle A at the points ofdivision. Furthermore, considering areas, and taking r as theradius of A, we have A = wr2, and B = 7r(- ) . Hence B = \A, or the sum of the areas of the four circlesB equals the area of A. Hence thefour Ds…
Geometry
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