1. 1.4/1.5 Points, Lines, Planes & Segments Warm-up (IN) Learning Objective: to describe and sketch relationships between points, lines, planes, rays and segments, and to find lengths and distances in real world situations. 1. Solve each equation 4.5 3 5 32/7

2. Notes Points that lie on the same line or Collinear - A B or Any 2 pts. Determine a line Any 3 noncollinear pts. Determine a plane Coplanar - Points that lie on the same plane A B C or Intersect – to share at least one point A

3. Parallel – Never intersecting Lines must be coplanar Skew – Never intersecting and not parallel 2 planes intersect in a line T&C p. 23 CKC p. 24

4. Ray – A B C or Must start with the endpoint Segment – A B C or Congruent – Same length A B C D or Segments are congruent and measures are equal!

5. Segment Addition Postulate – X Z Y If y is between x and z, then XY+YZ= XZ Ex 1 – Q P C B A 5 a. find PQ Ex 2 – what can you conclude about the figure? A D C B E All pts are coplanar A, E and C are collinear

6. HW – p. 33 #1-16 Out – Define 2 new terms that you learned. Summary – I can remember… Quiz Friday! Assess your progress p.20