2 lines that extend in the same direction & remain the same distance apart are said to be this

Below you can find the 2 lines that extend in the same direction & remain the same distance apart are said to be this Jeopardy Words Answer. The answer to 2 lines that extend in the same direction & remain the same distance apart are said to be this has 8 letters. This clue belongs to the Math category and is part of Jeopardy Word Level 875. If you scroll near the bottom you will find other clues and answers part of level 875