Answer: e = 49 degrees, f = 131 degrees, d = 90 degrees.
Explanation:
since the only angle that was shown has a vertically opposite angle, e is also 49 degrees. then, we can add 49+49 to 98, and subtract it from 360, which is 262. divide that by 2, and each of the bigger angles are 131 degrees, so f is 131 degrees. and d is a complimentary angle to the other angle, which has a square on it, so it is right, or has 90 degrees angle. so then, d is also 90 degrees because if not, then it wouldnt be complimentary.