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There are three kinds of Lines.

A line segment, which has two finite points.

A "ray", which has one finite point, and another extending in one direction, and

A "line", which figuratively speaking, extends in two opposing directions infinitely.

Also, if you're speaking about parallel, perpendicular, etc.

A set of parallel lines extend in both directions but never touch (like an equal sign) "="

Perpendicular lines intersect at a 90 degree angle ( like a plus sign ) +

Hope I helped!

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14y ago

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