1. Parallel Proof

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

2. 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..

3. 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.

4. very strict huh? )

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