ABC is a triangle with a right angle at A.M and N are points on BC such that AM is the altitude , and AN is the angle bisector of ∠ BAC . If CN/NB = 21 , what is CM/MB ?
In a triangle ABC , the altitudes from A , B , C meet BC , AC and AB at D , E , F.Prove that perpendicular bisector of EF also bisects BC.How to prove it ?