Thread: Parallel Proof

Prove: A line that meets one of two parallel lines must meet the other.

Originally Posted by GoldendoodleMom

Prove: A line that meets one of two parallel lines must meet the other.

how do you define parallel lines? that should be a hint..

Originally Posted by GoldendoodleMom

Prove: A line that meets one of two parallel lines must meet the other.

Strictly speaking, this is not necessarily true.
We must assume that we are working in a plane, we must assume that the problem involves three distinct lines only to of which are parallel.

very strict huh? )

of course, i already assume we're in Euclidean plane..