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 262
efore GC. CM : GC. CF, that is,CM : C-^7 is a given ratio, but i/iY and DF are parallel, there-fore NG : CD :: MG : CF, and J/2T : DF :: JfC : CF. Therefore R is a fixed point and MN is of constant length,since CD and DF are both given. Therefore LM always touchesthe fixed circle with centre N and… … Fig. i,
Geometry
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