Answer:
-360
Step-by-step explanation:
The worng answer is [b]
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Answer:

Answer C is correct.
Step-by-step explanation:

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Since a line is equal to 180 degree
you pick one that has the variable x in it.
For example: 5x=180
180/5=36
therefore x=36
2. 6x=180
180/6= 30
x=30