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प्रश्न
In the below fig, AOC is a line, find x.
उत्तर
Since `∠` AOB and `∠`BOC are linear pairs
`∠`AOB + `∠`BOC = 180°
⇒70° + 2x° = 180°
⇒ 2x° = 180° - 70°
⇒ 2x = 110°
⇒ x `110/2`
⇒ x = 55°
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