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the part of a line consisting of 2 endpoints and all points between them


the part of a line consisting of one endpoint and all the points of the line on one side of the endpoint

opposite rays

2 collinear rays with the same endpoint. always form a form

skew lines

noncoplanar; they are no parallel and do not intersect

parallel lines

coplanar lines that do not intesect

parallel planes

planes that do no intersect

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