While diving a wreck off the coast of tortola Mr. Dub descended to a depth of 123 feet. While chasing a fish he adjusted his position by ascending 37 feet. What is his new depth?

M∠abc=138° and m∠def=31° . which statement is true about ∠abc and ∠def ? a: the angles are neither complementary nor supplementary. b: the angles are complementary. c: the angles are supplementary.