In figure, ABC is a right triangle, right-angled at C and D is the mid-point of BC. Prove that AB2=4AD2-3AC2
P and Q are respectively the mid-points of sides AB and BC of a triangle ABC and R is the mid-point of AP, show that:
ar(PBQ)=ar(ARC)
ABC is a right angled triangle at C. If D is the mid point of BC,prove that AB2=4AD2-3AC2