Question

If two sides of a parallelogram are represented by the vectors, then the lengths of the diagonals of the parallelogram by the parallelogram law are |→d1| and |→d2|. The mathematical representation for the length of the diagonals is__________________.

Answer 1

If two sides of a parallelogram are represented by the vectors, then the lengths of the diagonals of the parallelogram by the parallelogram law are |→d1| and |→d2|.

The mathematical representation for the length of the diagonals is

|→d1| = | →u + → v|

|→d1| = | →u - → v|