"The diagonals of a parallelogram `A B C D` intersect at `Odot` A line through `O` meets `A B` in `X
Channel: Doubtnut
Date: 2020-07-05

"The diagonals of a parallelogram `A B C D` intersect at `Odot` A line through `O` meets `A B` in `X` and `C D` in `Ydot` Show that `a r( A X Y D)=1/2(A R ^(gm)A B C D)`"