Write the numeral which represents
(5 x 100 000) + (2 x 1000) + (7 x 100) + (9 x 1)

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.