Warmup Name a line and a plane in

Warm-up: � Name a line and a plane in the picture below:

Section 1. 4: Segments, Rays, and Parallel Lines/Planes LEQ: What are segments and rays and how are they named? What are parallel lines and planes?

� Segment: � Drawing part of a line, has exactly two endpoints � Symbol � Name: “segment AB”

� Ray: part of a line, has exactly one endpoint with other end extending in opposite direction � Drawing � Symbol � Name: “Ray AB”

� Opposite rays: Two rays that share a common endpoint and extend in opposite directions

� Parallel lines: Two identical lines that never intersect. � Symbol: ll m ll f

� Skew � Two lines: lines that never intersect but are not parallel.

� Parallel Planes identical planes that don’t intersect � Planes ABCD and EFGH are parallel

Add in: Line symbol:

Match the picture to the term � Segment � Ray � Opposite rays � Skew Lines � Parallel Planes � Parallel Lines

Ex. 1 � Name all segments and rays in the figure. Name any opposite rays

Ex. 2 � Name all the parallel planes in the figure below:

Ex. 3 � Name all segments parallel to AE. � Name all segments skew to AE. � Name all segments parallel to DC. � Name all segments skew to DC. C D A H E B G F

Do ex. 3 and 4

Hwk: � P. 25 -27: 1 -15 odd, 16 -23, 38