Exercises on Euclid and in modern geometry for the use of schools, private students, and junior university students (1881)
McDowell, James L · Cambridge, Deighton, Bell, and Co. · leaf 246
six points are in involution, q. e. d. 247. If a quadrilateral be inscribed in a circle, andanother circumscribed touching at the angular points, provethat, (a) their diagonals intersect in the same point, and form,an harmonic pencil; (J3) their third diagonals are in the 247.] AND IN MODERN… … t Let ABCD be the inscribed quadrilateral, and EFGff thecircumscribed touching at the angular points of the former. Let0 be the centre of the circle, and let AB, CD meet in T; BC, ADin R; EF, HG in 8, and suppose that V is the point in which FGHE, if produced, would meet, and let AG and BD…
Geometry
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