Given that AB II CD, find the values of the unknowns in each of the following figures.
PR
78°
B
(a)
117°
(b)
A
E
B
A
aº
fº
eo
35°
31°
bº
dº
co
C
-D
D
C
S
Q
B
(d)
A
60°
750
B
(c)
D
F
830
jº
-D
E
C20
hº
E
69°
C
А
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