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Subject :NSO    Class : Class 7

In the given figure (not drawn to scale), AB is parallel to CD and ∠ECD is a right angle. Find ∠ Y?

(A) 111°

(B) 112°

(C) 113°

(D) 114°
We can use Solution=90-22=68.Then,180-68=112.

Ans 1:

Class : Class 7
We could draw an imaginary line from C perpendicular to EC and parallel to AB dividing angle y into 2 parts and marking the point as R. Now RCA = CAB =22 as they are alternate interior angles & RCE = ECD = 90. So angle y will be equal to 90+22=112.

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