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प्रश्न
In the given figure, measures of some angles are shown. Using the measures find the measures of ∠x and ∠y and hence show that line l || line m.
उत्तर
∠x = 130° ...(vertically opposite angles)
∠y = 50° ...(vertically opposite angles)
∠x + ∠y
= 130° + 50°
= 180°
∴ line l || line m ...(Interior angles test)
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