# Thread: parallelogram

1. ## parallelogram

In parallelogram ABCD, the diagonal AC = 521.16 the angle ABC = 110 degrees 48 minutes 12 seconds and BAC = 27 degrees 19 minutes 36 seconds. Find the lengths of the sides ad the other diagonals.

law of cosines can help..

2. Law of sine will be easy. Angle ABC, BAC is given. Find BCA.