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**Aim: How do we identify segments and rays? **

HW#4: textbook pg.25~26/1~23, 25~27, 46~49 Do-Now:Name the figure. 1) the right side. 2) the back. 3) Two pairs of parallel planes.

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**Parallel planes are planes that do not intersect.**

A line and a plane that do not intersect are also parallel. Plane ABCD ll Plane GHIJ Plane ABCD ll GH

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B A A segment is the part of a line consisting of two endpoints and all the 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. X Y Opposite rays are two collinear rays with the same endpoint. *Opposite rays always form a line. AF and AE are opposite rays

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**The three segments are The four rays are**

Ex1) Name the segments and rays in the figure at the right. Q P L The three segments are The four rays are Q. LP and PL form a line. Are they opposite rays? Explain.

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**Parallel lines are coplanar lines that do not intersect.**

Skew lines are noncoplanar, not parallel and do not intersect.

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**Ex2) (a)Name all labeled segments that are parallel to DC.**

(b) Name all labeled segments that are skew to DC.

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**Assessment 2) Name the figure. a) three pairs of parallel planes.**

1) a)Name all labeled segments that are parallel to GJ. b) Name all labeled segments that are skew to GJ. c) Name another pair of parallel segments. d)Name another pair of skew segments. 2) Name the figure. a) three pairs of parallel planes. b) a line that is parallel to plane GJIH.

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