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 378
e chords joining two fixed points on a circle to the ends of anydiameter intersect on a fixed circle which cuts the former orthogonally. XXXIV EUCLIDS ELEMENTS. BOOK IV. 46. The perpendiculars from the angles of a triangle on the oppositesides meet in a point. [A proof of this theorem has already…
Euclid's Elements · Geometry · Mathematics, Greek
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