LINE, DA laser beam stretching across a dark room (no endpoints visible)., A road lane divider line photographed so it appears to run off into the distance., LINE SEGMENT, A ruler showing only the marks between 0 and 7 (clearly two endpoints)., straws broken cleanly at both ends., RAY, A flashlight shining a beam from the flashlight head outward (one starting point)., The sun with a single sunray pointing outward., PARALLEL / PERPENDICULAR / INTERSECTING, Two railway tracks., A T-junction road sign., A pair of scissors open (blades crossing)., Books stacked neatly on a shelf with edges.

Lines

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