Hello!
As you can see, this is a right triangle. Therefore on of the angles is 90°. The vertical angle across from 133° is also 133°. This angle and the other angle in the triangle besides 90 and p is equal to 180. To find the length we subtract from 180.
180-133=47°.
Now we add.
47+90=137
Now we subtract from 180°.
180-137=43
Therefore, our answer is C) 43°
I hope this helps!