Question

Please help me with number 17 and also 18 thank yiu

Answer 1

A = (48+A=180 so ) 180 - 48 = "132 degrees"
B = "180 degrees" (straight lines are always 180)
C = (C+n=180 & n=42 so ) 180 - 42 = "138 degrees"
n = (48+90=138 so ) 180 - 138 = "42 degrees"