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प्रश्न
In the given figure, if lines l and m are parallel, then x =
विकल्प
20°
45°
65°
85°
उत्तर
The given figure is as follows:
Since, l || m. Thus, 65° angle and ∠1 are corresponding angles.
Therefore,
∠1= 65° (i)
In a triangle, we know that, the exterior angle is equal to the sum of the interior opposite angle.
In ΔAOB:
∠1 = x +20°
x = ∠1 - 20°
From equation (i):
x = 65° - 20°
x = 45°
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