ats
Last Activity: 4 Years ago
Let the angle formed by n and k be angle A.
Since the lines l and k are parallel and the lines m and n are parallel, the four lines form a parallelogram.
Now, angle A and the angle marked as 120o are supplementary.
Hence,
A + 120 = 180
=> A= 60o
Now, angle A and angle Z are equal since opposite angles of a parallelogram are always equal.
Hnece, Z=60o
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