Answer:
d = 90 degrees
e = 49 degrees
f = 131 degrees
Step-by-step explanation:
angle d is 90 degrees because adjacent angles add to 180 degrees, if the adjacent angle is right it is equal to 90 degrees, 180 - 90 is 90.
angle e is 49 degrees because opposite angles are equivalent.
angle f is 131 because adjacent angles add to 180 degrees, if the adjacent angle is 49, 180 - 49 is 131.
