posted by Anonymous .
find the length of ab & bc of a triangle abc having given the length of ac = 28inch, angle abc = 90, angle bac =30,, angle acb = 60
you have a standard 30-60-90 right-angled triangle whose sides are in the ratio of 1:√3:2
so AB/28 = √3/2 ---> AB = 14√3
BC/28 = 1/2 -----> BC = 14
(The sides of the standard triangle were multiplied by 14)