In geometry, parallel lines are coplanar infinite straight lines that do not intersect at any point. Parallel planes are planes in the same three- dimensional space that never meet. Parallel curves are curves that do not touch each other or intersect and keep a fixed minimum distance. In three- dimensional Euclidean space, a line and a plane that do not share a point are also said to be parallel. However, two noncoplanar lines are called skew lines. Line segments and Euclidean vectors are parallel if they have the same direction (not necessarily the same length)
. Parallel structure, or parallelism, is used in sentences to promote readability and create a common level of importance between ideas. It involves using a common grammatical pattern throughout a sentence, often matching verb tenses, nouns, and conjunctions
