[" 22.If "P,Q" and "R" are the mid points of sides "BC,CA],[" and "AB" of a triangle and "AD" is perpendicular on "29" ."],[BC" from "A" ,then prove "P,Q,R" and "D" are cyclic."]

If P,Q and R are the mid-point of the side BC,CA and AB of a triangle and AD is the perpendicular form A and BC, prove that P,Q and D are concylic.

If D is the mid point of side BC of a triangle ABCand AD is perpendicular to BC, then

If D is the mid-point of side BC of a triangle ABC and AD is perpendicular to AC, then

P ,\ Q\ a n d\ R are, respectively, the mid points of sides B C ,\ C A\ a n d\ A B of a triangle A B C and AD is the perpendicular from vertex A to BC,then prove that the points P,Q,R and D are cyclic.

P ,\ Q\ a n d\ R are, respectively, the mid points of sides B C ,\ C A\ a n d\ A B of a triangle A B C and AD is the perpendicular from vertex A to BC,then prove that the points P,Q,R and D are cyclic.

If D is the mid-point of the side BC of triangle ABC and AD is perpendicular to AC, then

P, Q, R are the midpoints of the sides AB, BC and CA of the triangle ABC and O is a point within the triangle, then OA + OB + OC =

D, E and F are the mid-points of the sides BC, CA and AB respectively of triangle ABC. Prove that: BDEF is a parallelogram.