1. Parallel and Perpendicular Lines
Chapter 3
Parallel and Perpendicular Lines

2. Section 6 Using Perpendicular and Parallel Lines

3. A ________________________________ is a geometric drawing that uses a limited set of tools, usually a compass and a traight edge (a ruler without marks).

5. Example 1: Construct a line that passes through point P and is parallel to line l.

6. Checkpoint: Construct Parallel Lines Draw a line c and a point A not on the line. Construct a line d that passes through point A and is parallel to line c.

9. Example 2: Use Properties of Parallel Lines Ladders were used to move from level to level of cliff dwellings, as shown at the right. Each rung on the ladder is parallel to the rung immediately below it. Explain why l || p.

10. Example 3: Use Properties of Parallel Lines Find the value of x that makes AB || CD.

11. Checkpoint: Use Properties of Parallel Lines 2
Checkpoint: Use Properties of Parallel Lines 2. Use the information in the diagram 3. Find a value of x so that to explain why a || c. d || e.

12. You have now studied six ways to show that two lines are parallel.