In triangle ABC , angle B is equal to twice of angle C , D is a point on BC such that AD bisects `/_BAC` and AB=AD . Prove that `/_BAC=72^@`

ABC is a triangle in which /_B=2/_C*D is a point on BC such that AD bisects /_BAC and AB=CD. Prove that /_BAC=72^(@) .

ABC is a triangle in which /_B=2/_CD is a point on BC such that AD bisects /_BAC and AB=CD. Prove that /_BAC=72^(0) .

In triangle ABC , angle C = angle 90 , D is the mid point of BC, Prove that AB^2 = 4AD^2 -3AC^2 .

In triangle ABC , angle C = angle 90 D is the mid point of BC, prove that AB^2 = 4AD^2-3AC^2 .

D is a point on the side BC of a DeltaABC such that AD bisects angle BAC . Then

In a triangle ABC, side AC is greater than side AB and point D lies on side BC such that AD bisects angle BAC. Show that: angle ADB is acute.

In ABC, if AD perp BC and AD^(2)=BD xx DC, prove that /_BAC=90o

In a DeltaABC , AB = AC and D is a point on AB, such that AD = DC = BC. Then, angle BAC is

triangle ABC and triangle DBC are isosceles triangles on the same base BC. Prove that line AD bisects BC at right angles