Hambidge, Jay, 1867-1924 · New Haven : Yale University Press · leaf 49
DYNAMIC SYMMETRY . 33 The radius of a circle escribing a pentagon is 1, and the radius of the inscribed circle is .809. Therefore the area AB, in Fig. 10, is composed of two whirling square rectangles. The area BC plus AD is composed of eight squares and … Fig. 10. eight whirling square rectangles. If these areas BC, AD, are placed one over the other, the area is then expressed as 5.236, i. e., 1.236 plus four squares. The reciprocal of 5.236 is .191. (Fig. 11.) 4 + -t- Fig. 11. The area 5.236. The relation of the diameter of the inscribed circle of…
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