+152 by vertical angles, angle e is 49 degrees.
angle f shares a straight angle with the 49 degree angle, so angle f is 180 - 49 = 131 degrees.
similarily, angle d shares a straight angle with the right angle, so angle d is simply 180 - 90 = 90 degrees.
hope this helped! please let me know if you are confused about anything i did :)
