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# Parallel and perpendicular lines

**a) Parallel lines:**

Lines are said to be parallel if they do not cross the path of one another

or if they do not meet even though they have been extended

indefinitely. Parallel lines have the same gradient. Consider the

following lines on the Cartesian plane.

Back to: O level mathematics notes syllabus uganda

Lines are said to be parallel if they do not cross the path of one another

or if they do not meet even though they have been extended

indefinitely. Parallel lines have the same gradient. Consider the

following lines on the Cartesian plane.