Question 497289
Angle A = 6x
Angle B = 3x
Angle C = x

x + 3x + 6x = 180 degrees.
10x = 180 degrees.
x = 18 degrees.

Angle A = 108 degrees.
Angle B = 54 degrees.
Angle C = 18 degrees.

108 + 54 + 18 = 180 degrees.
This does check.
Cleomeniius.