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  1. Parallel Lines, and Pairs of Angles - Math is Fun

    Parallel lines have so much in common. It's a shame they will never meet! When parallel lines are crossed by another line (called a Transversal), special angle relationships appear. In this example, …

  2. Parallel (geometry) - Wikipedia

    Two distinct lines l and m in three-dimensional space are parallel if and only if the distance from a point P on line m to the nearest point on line l is independent of the location of P on line m.

  3. Parallel lines - Definition, Properties | What are Parallel ...

    Parallel lines are those lines that are always the same distance apart and that never meet. The symbol used to denote parallel lines is ||. Explore more about parallel lines, equations, and angles formed by …

  4. What are Parallel Lines? Definition, Properties, Examples, Facts

    In geometry, parallel lines can be defined as two lines in the same plane that are at equal distance from each other and never meet. They can be both horizontal and vertical.

  5. Parallel Lines | Definition, Properties & Formula - GeeksforGeeks

    Jul 23, 2025 · Parallel lines are two or more than two lines that are always parallel to each other, and they lie on the same plane. No matter how long parallel lines are extended, they never meet.

  6. Parallel lines - Math.net

    Below are some of the key properties of parallel lines that can be used to determine if two lines are parallel. Parallel lines are always equidistant from each other. Parallel lines never intersect at any …

  7. Parallel Lines - Definition, Math Steps, Examples & Questions

    What are the properties of parallel lines? Parallel lines are always straight lines that are the same distance apart, they never intersect and they are coplanar (meaning on the same plane).