The elements of Euclid for the use of schools and colleges; comprising the first six books and portions of the eleventh and twelfth books; (1903)
Euclid, Todhunter, I. (Isaac), 1820-1884, ed. edt, Simson, Robert, 1687-1768, ed. edt · London; New York, Macmillan · leaf 405
The A« ODQ and OCP are similar (VL 6); .*. the z ODQ == the z OCP, and .-. := a right angle. .. Q lies in the straight line drawn through D at right z^ to OD^ 81. 0 is a fixed point from ivhich any straight line is draion meeting afixed circle at P; in OP a point Q is taken such that OQ is to OP in… … For let C be the centre of the fixed circle ; in OC take a point Dsuch that OD is to OC in the fixed ratio, and draw any radius CP ofthe fixed circle ; draw DQ parallel to CP meeting OP, produced ifnecessary, at Q. Then the A« OCP and ODQ are similar ; [VI. 4... OQ : OP :: OD : OC, that is, in the…
Euclid's Elements · Geometry · Mathematics, Greek
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