Question

in the figure, O is the point of intersection of the diagonals AC and BD of a rhombus ABCD.P,Q,R are the points on OB,OA and OD respectively, such that OP= 1cm, OQ=2cm and QR= 4cm. prove that ∆PQR is right angle.

Answer 1

sorry,
I am confused weather the questions is correct or wrong