Answer:
As of right now I am only able to answer question 5. Which should be 100. Triangles always equal to 180 degrees, and you already know two of the sides of a triangle, which was 50 and 30. 50 and 30 when added together make 80, so now subtract 180 from 80 and that's your answer. Now, I know this wasn't done on the same triangle, but it didn't have to be. Why you ask? This is because you already know they are both congruent to each other, and their angles correspond.
Also, what is question 6 asking?