The values are
.
From the diagram
(Substitute
)

Apply cross product property
then ad = bc.

(Substitute
)

Apply crass product property
then ad = bc.
Divide each side by 2


The given triangle ABC is a right angle triangle so 
In a triangle the sum of the angles are 
(Substitute
)

Subtract 120 from each side.
\
The values are
,
and
.