This means parallel lines will never meet, and the internal angles of a triangle always ... There’s a chance that the universe is a sphere, or a donut, or a saddle, or a dodecahedron, or some kind of ...

Parallel lines are the same distance apart from each other all the way along their length. Even if the lines are made longer, they will never meet. You can find parallel lines all around you.

Parallel lines are the same distance apart from each other all the way along their length. Even if the lines are made longer, they will never meet. You can find parallel lines all around you.