Question 502245
A = 9x
B = 3x
C = x
9x + 3x  + x = 13x = 180 degrees.
x = 13.85 degrees, angle C.
3(13.85) = 41.55 degrees, angle B
9(13.85) = 124.65 degrees, angle C
13.85 + 41.55 + 124.65 = 180.05 degrees (round off error)
Cleomenius.