For each question find the missing angle and give a reason for your answer.
(Don't forget to show your working!)
1.
2.
3.
135
50"
a
72
154
c
4.
5.
6.
135
115
120
82
*
%
e
of
7.
8.
9.
25
30°
с
83'd
d
54"
10.
11.
12.
܀
cº
bº
140
76
87
135
130 /
d
13.
14.
15.
52
e
X
74
136
97
e
86
37
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