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 268
D C … Fig. i. Fi£. 2. take A the pole of BC with respect to the origin 0, B the poleof CA, and 0 the pole of AB. Therefore (239) EC is the polarof A, CA! of B, and AB of C. Let BFE be the polar of /,therefore (239) D is the pole of AI or AD. Similarly, E is thepole of BE, and F of CF. Again, because A is…
Geometry
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