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Lines And Angles — Maths STD 9 — Question

Maharashtra BoardEnglish MediumSTD 9MathsLines And Angles2 Marks
Question
In figure, AOC is a line, find x.
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Answer

Since $\angle\text{AOB}$ and $\angle\text{BOC}$ are linear pairs,$\angle\text{AOB}+\angle\text{BOC}=180^\circ$
70 + 2x = 180 2x = 180 - 70 2x = 110$\text{x}=\frac{110}{2}$
x = 55 Hence, the value of x is 55°

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