The second one might be the answer
The answer is square root of 8
If you are referring to angles of a line, 102° and 78° could be angles of a line since a line equals 180°. This would also be the same for an interior triangle angle and it's matching exterior triangle angle. The two angles (102° + 78°) would also equal 180° since they would be supplementary angles.
I would need to see a picture to know what you are referring to with the 45°.
Hope this helps a little at least! :)
The figure is a right angle
Complementary = sum of 90 degrees
35 + 2x - 5 = 90
30 + 2x = 90
2x = 60
Solution: x = 30