Show that the coplanar points `(-1,2,1),(1,-2,5),(4,-7,8) and( 2,-3,4)` are the vertices of a
Channel: Doubtnut
Date: 2020-04-12

Show that the coplanar points `(-1,2,1),(1,-2,5),(4,-7,8) and( 2,-3,4)` are the vertices of a parallelogram.