In `DeltaABC` prove that `AB^2+AC^2=2(AO^2+BO^2)`; where O is the middle point of BC.

In ABC Prove that AB^(2)+AC^(2)=2(AO^(2)+BO^(2)), where O is the middle point of BC

In any triangle ABC,prove that AB^(2)+AC^(2)=2(AD^(2)+BD^(2)), where D is the midpoint of BC .

in Delta ABC,/_A=2/_B Prove that BC^(2)=AC^(2)+AC.AB

In any DeltaABC , prove that ac cosB-bc cosA=(a^(2)-b^(2))

In a quadrilateral ABCD prove that AB^(2)+BC^(2)+CD^(2)+DA^(2)=AC^(2)+BD^(2)+4PQ^(2) where P and Q are middle points of diagonals AC and BD.

In a quadrilateral ABCD ,prove that AB^(2)+BC^(2)+CD^(2)+DA^(2)=AC^(2)+BD^(2)+4PQ^(2) where P and Q are middle points of diagonals AC and BD.

In o+ABC,AB=AC, and the bisectors of angles B and C intersect at point O. Prove that BO=CO and the ray AO is the bisector of angles BAC.

In DeltaABC,AB=AC and the bisectors of angleB and angleC meet at a point O. Prove that BO = CO and the ray AO is the bisector of angleA .

In Delta ABC,AB=AC and the bisectors of /_B and /_C meet at a point O. Prove that BO=CO and the ray AO is the bisector of /_A.

In ABC,AB=AC, and the bisectors of angles B and C intersect at point O .Prove that BO=CO and the ray AO is the bisector of angle BAC