A. C is on the bottom, Bis on the left
2arctan(2/5) = 44°
180° -44° = 136°
The angles are 44°, 136°.
11 / 634
Decimal form: 0.017350158...(there are probably more digits, but these are all that fit on my calculator screen)
Fraction form: 11/634
634 / 11
I have attached an image of this problem completely worked out.