In a triangle, if 3angleD=4angleS=6angleR, Calculate the measures of angle D, angle S and angle R.

from 3D = 6R

D = 2R

from 4S = 6R
S = 6R/4 = 3R/2

we know D + S + R = 180°
2R + 3R/2 + R = 180
4R + 3R + 2R = 360
9R = 360
R = 40
S = 60
D = 80