Q. 294.6( 5 Votes )

In Fig. 8.141, if l || m, then x =


A. 105°

B. 65°

C. 40°

D. 25°

Answer :

Given that,

l m and n cuts them


Let,


1 = 65o


2 = x


3 = 40o


1 = 4 = 65o (Alternate angle) (i)


3 + 4 + 5 = 180o (Angle sum property)


40o + 65o + 5 = 180o


5 = 75o


Now,


2 + 5 = 180o (Linear pair)


x + 75o = 180o


x = 105o

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