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4-1: Parallel Lines and Planes

4-1: Parallel Lines and Planes. 4-1: Parallel Lines and Planes. Parallel Lines : Two lines that are in the same plane and do not intersect. Above AB || CD AB || CD AB || CD BA || DC. A. B. C. D. 4-1: Parallel Lines and Planes. Parallel planes : Planes that do not intersect

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4-1: Parallel Lines and Planes

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  1. 4-1: Parallel Lines and Planes

  2. 4-1: Parallel Lines and Planes • Parallel Lines: Two lines that are in the same plane and do not intersect. • Above • AB || CD AB || CD • AB || CD BA || DC A B C D

  3. 4-1: Parallel Lines and Planes • Parallel planes: Planes that do not intersect • Shelves on a bookcase are an example of parallel planes • Above • plane PSR || plane JML • plane PJK || plane SML • plane JMS || plane KLR Q R P S K L M J

  4. 4-1: Parallel Lines and Planes • Skew Lines: Lines that do not intersect and ARE NOT in the same plane • Example • Lines QP and KL are skew Q R P S K L M J

  5. 4-1: Parallel Lines and Planes • Name all: • Planes parallel to plane ABC • Segments that intersect AB • Segments parallel to FG • Segments skew to EF Plane EFG BC, AD, AH, AE, and BF EH, AD, and BC CG, DH, AD, BC, and AH

  6. 4-1: Parallel Lines and Planes • Your Turn. Name all: • Planes parallel to plane ABF • Segments that intersect DH • Segments parallel to CD • Segments skew to AB Plane DCG AD, CD, GH, AH, and EH AB, GH, and EF DH, CG, FG, and EH

  7. 4-1: Parallel Lines and Planes • Assignment • Worksheet #4-1

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