Q. 194.0( 4 Votes )

In Fig. 8.131, if

Answer :

Given that,

l1 l2


Let m and n be two transversal cutting them


w + x = 180o (Consecutive interior angle)


x = 180o – w (i)


z = y (Alternate angles) (ii)


From (i) and (ii), we get


x + y = 180o – w + z

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