The measure of the missing angles are ;
1. f =
2. e = 71°
3 d = 90°
Adjacent angles share a common side and a common vertex but do not overlap. The sum of adjacent angles is equal to the straight angle (180 degrees).
angle 71 and f are adjascent, therefore:
71+ f = 180°
f = 180 - 71
f = 109°
e = 71° ( vertical angles)
d + 90 = 180
d = 180 - 90
d = 90°