Lesson 1.4.notebook
August 30, 2012
Warm‐up
1. Name three collinear points.
2. Name two different planes that contain the points C and G.
3. Name the intersecon of plane AED and plane HEG.
4. How many planes contain the points A, F, and H?
5. Show that this conjecture is false by giving a counterexample: Two planes always intersect in exactly one line.
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Lesson 1.4.notebook
August 30, 2012
Warm‐up
1. Name three collinear points.
2. Name two different planes that contain the points C and G.
3. Name the intersecon of plane AED and plane HEG.
4. How many planes contain the points A, F, and H?
5. Show that this conjecture is false by giving a counterexample: Two planes always intersect in exactly one line.
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Lesson 1.4.notebook
August 30, 2012
Page 19 Homework Answers
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Lesson 1.4.notebook
August 30, 2012
Lesson 1.4 ‐ Segments, Rays, Parallel Lines, and Planes
Vocabulary
A segment is a part of a line with two endpoints and all the points in between.
A ray is part of a line with one endpoint and all the points on one side of the endpoint.
Opposite rays are two collinear rays that share an endpoint. (always form a line)
Parallel lines are coplanar lines that never intersect.
Skew lines are noncoplanar, not parallel, and never intersect.
Parallel planes are planes that do not intersect.
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Lesson 1.4.notebook
Ex 1:
August 30, 2012
Name the segments and rays in each figure.
a.
b.
c. LP and PL form a line. Are they opposite rays? Explain.
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Lesson 1.4.notebook
Ex 2:
August 30, 2012
Idenfying Parallel and Skew segments.
a) Name all segments parallel to AE
b) Name all segments skew to AE
c) A pair of parallel planes
d) A line that is parallel to plane BCGF
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Lesson 1.4.notebook
August 30, 2012
Homework: Page 25 #1‐15, 25‐33, 51‐58
Check Point Quiz Page 28 #1‐9
Quiz 1.1 ‐ 1.4 Tomorrow!
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