This question was asked in Ex 10.5, 8

Bisector of angle A, B and C of triangle ABC intersect its circumcircle at D, E and F respectively  prove that the angle of triangle DEF are 90 degree minus half of A 90 degree minus half of di and 90 degree minus half of c

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flash# tag panther
Aug. 22, 2018, 10:02 a.m.