So the first thing you might say and this is a general way to think about these problems where they give you some angles and you have to figure out other angles based on sum of angles in a triangle equaling 180, or this one doesn't have parallel lines but you might see one with parallel lines and supplementary lines and complementary lines is to just fill in every thing that you can figure out and one way or antoher you can probably figure out what this question mark is.