Question:
In the below figure, AOC is a line, find x.
Solution:
Since ∠AOB and ∠BOC are linear pairs,
∠AOB + ∠BOC = 180°
70 + 2x = 180
2x = 180 - 70
2x = 110
x = 110/2
x = 55
Hence, the value of x is 55°
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