Planes, lines, points, and segments are all around you. The city map shown is just one example of a plane that contains points, lines, and segments. In this plane, you see streets that are parallel, streets that intersect, and streets that are perpendicular. Can you identify two streets that are perpendicular and two that are parallel? You will answer this question about the map, as well as other questions, later in the lesson.
Two streets that are perpendicular: Main Street and Maple Street.
Two streets that are parallel: Oak Street and Pine Street.