Question

Choose the correct alternative:
One of the diagonals of parallelogram ABCD with `vec"a"` and `vec"b"` as adjacent sides is `vec"a" + vec"b"`. The other diagonal `vec"BD"` is

Options

• `vec"a" - vec"b"`

• `vec"b" - vec"a"`

• `vec"a" + vec"b"`

• `(vec"a" + vec"b")/2`

Answer 1

`vec"b" - vec"a"`