1) A = 116 2) B = 67 3) A = 169 4) B = 42 C = 180 - (180-68)-(180-B) = 30 A = 180 - (180-88) - (180-B) = 50 5) C = 144 B = 180-C = 36 A = 180-B -(180-119) = 83 6) C = B = 180-42 = 138 A = D = 180-138 = 42 7) B = 180-93 = 87 C = 180-D = 54 D =180-54 = 126 A = 180-B =93 8) A = 60 B = 84 C = 180-84 =96 9) A = 180-68 = 112 B = 180-45 = 135 10) B = 180-110 = 70 A = 180-70 = 110