Question

If one side of a parallelogram is 4 cm, other 6 cm, and the diagonal 4√2 cm, 

what is the length of the other diagonal?

Answer 1

p² + q² = 2(a² + b² )

where:

p = 4$\sqrt{2}$ cm

a = 6 cm

b = 4 cm

Answer = 3 $\sqrt{8}$ cm