[" 2.BC."],[" 2.Prove that "/_ABC" is iscoscles if median AD is "],[" perpendicular to "BC" ."]

Prove that DeltaABC is isosceles if median AD is perpendicular to BC.

In a tringle ABC, AB = AC and bisector of angle A meets BC at D. Prove that : (i) DeltaABD cong DeltaACD (ii) AD is perpendicular to BC.

In a tringle ABC, AB = AC and bisector of angle A meets BC at D. Prove that : (i) DeltaABD cong DeltaACD (ii) AD is perpendicular to BC.

Prove that ABC is isosceles if any one of the following holds: Altitude AD bisects BC Median AD is perpendicular to the base BC

Delta ABC is an obtus triangle in which /_B = obtus angle. If AD is perpendicular to BC ( or extended BC ) ,then prove that AC^(2) = AB^(2) +BC^(2) + 2BC xx BD .

In right angled triangle ABC , /_A is a right angle. AD is perpendicular on the hypotenuse BC . Prove that (DeltaABC)/(DeltaACD)=(BC^(2))/(AC^(2)) .

In the figure, AD is perpendicular to BC, prove that AB+AC gt 2AD .

In the figure, AD is perpendicular to BC, prove that AB+AC gt 2AD .

ABC is an equilateral triangle .If AD bisects angle A, Prove that AD is perpendicular bisector of BC .

In a DeltaABC , Median AD perpendicular to side BC . Find the value of tanA/tanB