# Math Help - Vectors and rhombus.

1. ## Vectors and rhombus.

Q18: Consider points A , B , C and D with position vectors
7 i – 4 j + 7 k ,
i– 6j + 10 k, –i , 3j + 4k and 5i – j + 5k respectively.
Then ABCD is a

A. Rhombus
B. Rectangle
C. Parallelogram but not a rhombus
D. None of Above

how?

2. What do you know about rhombi, rectangles and parallelograms?