1. The problem statement, all variables and given/known data In the attachment. Need to calculate azimuth of BC. 2. Relevant equations 3. The attempt at a solution I dont understand why the azimuth of AB would be given as 126 degrees when it is almost a complete revolution of 360 degrees. I calculated the back azimuth which would be 306°55'17''. (126°55'17"+180°=306°55'17'').I added the interior B angle and got 178°18'58". But how could the of BC be greater then AB? Please help me. Thanks!