Question 26118
the sum of the three angles is 180
angle 1 = x
angle 2 = 3*x
angle 3 = (x+3*x)+10 --> u need to include the sum of the other two angles.
x+3x+(x+3x)+10=180
8x+10=180
8x=170
x=21.25

the third angle is (x+3x)+10=21.25+3*21.25+10=95