4-1: Parallel Lines and Planes

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# 4-1: Parallel Lines and Planes - PowerPoint PPT Presentation

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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## PowerPoint Slideshow about ' 4-1: Parallel Lines and Planes' - owen-holland

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### 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
• 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

4-1: 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

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

CG, DH, AD, BC, and AH

4-1: Parallel Lines and Planes
• 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

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