# geometry

posted by on .

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

• geometry - ,

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)