Segments, Rays, Parallel Lines and Planes. A segment is the part of a line consisting of two endpoints and all points between them. A ray is the part.

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Presentation transcript:

Segments, Rays, Parallel Lines and Planes

A segment is the part of a line consisting of two endpoints and all points between them. A ray is the part of a line consisting of one endpoint and all the points of the line on one side of the endpoint. Opposite rays are two collinear rays with the same endpoint. Opposite rays always form a line.

L P Q Name the segments and rays in the figure. Segments: LP, PQ, LQ Rays: LP or LQ, PQ, PL, and QP or QL

Parallel lines are coplanar lines that do not intersect. Skew lines are noncoplanar, therefore, they are not parallel and do not intersect. A B C D E F GH AB || EF AB and CG are skew

Parallel planes are planes that do not intersect. A B C D E F GH ABCD and EFGH are parallel planes.