1. Lines and Segments SY 2015-2016 Source: Geometry (2007) by Ron Larson et al

2. Definitions O Line Segment: is a subset of a line that contains two points (called the endpoints) and all points in between them.

3. Definitions O Between-ness

4. Postulate

5. Try this! Which segments are coplanar? Is AB + BC = AC ? Why or why not?

6. Try this! Solve for the unknowns.

7. Try this! Solve for BD if AB = BC, AC = DC, and AD = 12.

8. Try this! O Always, Sometimes, Never. If CA = AT, then A is the midpoint of CT.

9. Try this! Solve. Points A, B, C, D, E are collinear points. Point B is the midpoint of AE. Point D is the midpoint of BE. C is between points A & B. If BD = 3cm & CE = 7cm, then how long is AC?

10. Try this! True or False. Point D is a midpoint in the figure. C D A B

11. Take Note!

12. Definitions

13. Try this! Solve for the unknowns.

14. Try this! Solve for the unknowns.