Q. 8

If L, M and N are three straight lines such that L || M and L || N, then prove that M|| N.

L || M M|| L.

Now, M||L and L||N M||N.

Assume M will intersect N.

It is given that L ||M and L ||N

According to our assumption, M will intersect N which is contradictory to parallel axiom.

So, our assumption is wrong.

Thus, M|| N

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