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प्रश्न
The figure given below shows a pair of parallel lines cut by a transversal for the following case, find a and b, giving reason.
योग
उत्तर
a + 140° = 180° (Linear pair)
∴ a = 180° - 140° = 40°
But b = a (alternate angles)
= 40°
∴ a = 40°, b = 40°
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