Answer:
first of all we don't know what u look like
The angle that is supplementary to <COB is one that is next to it (in some relation)
and when you add the two angles together, they shall equal 180°.
Hope this will help
The answer is (B)!!!!!!!!!!!!!!!!!!!!!!!!
K^2 - 100h^2
(k - 10h)(k + 10h)