Which undefined terms are needed to define parallel lines?

The undefined terms are needed to define parallel lines that are co-planar and line. Parallel lines are co-planar lines that do not intersect.

The war began as a fight between mayans and the landowners of the country. the main causes of the guatemalan civil war was started by the greed of the united fruit company, the fear of communism, and the racism toward the  mayan  people.