Question

http://prntscr.com/4ux93z

Answer 1

\[\Large\rm \angle A=42^o\]\[\Large\rm \angle B=61^o\]Recall that the interior angles of a triangle sum to 180 degrees.

So we can use that information to figure out angle C.

Answer 2

Angle C will be the full 180 degrees minus angle A and angle B.