Answer:
mAngleB = 50 degrees
mAngleC = 130 degree
Step-by-step explanation:
The way I did this was by subtracting the given "mAngleA = 40" from the angle that complementary angles are at: 90 degrees, which means that equals 50 degrees. Then, I did the same with mAngleC with the angle that supplementary angles are at: 180 degrees. 180 - 50 = 130 degrees.
Hope my explanation wasn't too hard to follow!
