Q. 144.5( 11 Votes )

In Fig. 8.128, if

Answer :

Given that,

AB CD and transversal cuts them


Let,


1 = 120o + x and


2 = x


1 = 3 (Alternate angles)


3 = 120o + x (i)


2 + 3 = 180o (Linear pair)


x + 120o + x = 180o


2x = 60o


x = 30o

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