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.