A parallelogram is defined by vectors OA=(4,3) and OB=(1,1). Determine the length of the diagonals

Question

OA+OB=(4,3)+(1,1)
=(5,4)

sqrt(5^2+4^2)
=6.403

OA-OB=(3,2)

sqrt(3^2+2^2)=3.60

Therefore the length of diagonals are 6.40 and 3.60 units.