Question 700858
let three angles of triangle be a,b,c
 we know   a+b+c=180 degrees-----------(1)

 but we know  angles ratio 
hence a:b:c= 3:2:1 =3c:2c:c

according to this ratio we can write
a=3c , b=2c ,c=c

from (1)    3c+2c+c=180
             c=30 degrees
            hence a=3c=90 degrees
                  b=2c=60 degrees

hence three angles are in degrees 90,60,30