1. 3.1
Lines and Angles

2. Parallel Lines (//)- coplanar lines that never intersect

3. Perpendicular Lines (┴)- intersect to form right angles.

4. Skew Lines are NOT coplanar, are not parallel, and do not intersect.

5. Parallel planes- planes that do not intersect.

6. Name a pair of parallel lines.
Name a pair of perpendicular lines
Name a pair of skew lines.
Name a pair of parallel planes.

7. How many lines are there parallel to l that go through the point?

8. How many lines are there perpendicular to l that go through the point?

10. Transversal Line- a line that crosses two or more lines
Transversal Line- a line that crosses two or more lines. When it crosses two lines it forms 8 angles.

11. Corresponding Angles- angles that lie on the same side of the transversal and on the same place on the other two lines (for example top left, top left)

12. Alternate Interior Angles- non-adjacent angles that lie on opposite side of the transversal and between the other two lines.
<3 & <6
<4 & <5

13. Alternate Exterior Angles- non-adjacent angles that lie on opposite side of the transversal and on the outside the other two lines.
<1 & <8
<2 & <7

14. Same Side Interior (consecutive interior)Angles- angles that lie on the same side of the transversal and on the inside the other two lines.
<3 & <5
<4 & <6