Hambidge, Jay, 1867-1924 · New Haven, Conn., New York City, Yale University Press; [etc., etc.] · leaf 59
f the diagram in the 1 8 th proposition of the 13th book is a semi- circle on a given line. In brief the operation is this: AB is the given line and ABE is the semicircle. (See Fig. 33.) Euclid in sub- stance says: at A draw a line equal to AB at right angles to that line and call its point of… … to AG to meet AB at K, BL is made equal to AK. From the point L a line is drawn, parallel to AG to meet the arc of the semicircle at M. It is obvious that HLKM is a square and that HA and MB are rectangles of the whirling squares. In other words, Euclid has here constructed a root-five rectangle…
Design · Vases, Greek
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