Question

In the given figure, if lines l and m are parallel, then x = (a) 20° (b) 45° (c) 65° (d) 85°

Solution

The given figure is as follows: Since, . Thus, angle and ∠1 are corresponding angles. Therefore, (i) In a triangle, we know that, the exterior angle is equal to the sum of the interior opposite angle. In ΔAOB: From equation (i): Hence, the correct choice is (b). MathematicsRD Sharma (2019)All

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