Pls help I don't understand.

Question

1. 

Answer 1

By looking at it ros is a rt angle.

Since rot=145°; tos=55°, pot=35°

" Qos counter clockwise=165°; poQ=75°; Qos clockwise=195°

Qot counter clockwise=110°

Answer 2

As I suggested in a similar post, fill in the sizes of the other angles.

From there you can determine the size of the indicated angles.