1. Warm Up 10.17.11 Week 1 If I run, then you walk. 1) What is the inverse? 2) Place marks to show congruence: AB ≅ EF and DE ≅ BC : B A C E D F

2. Geometry 3.1 Day 1 I will Identify relationships between lines. Parallel Lines When two lines are coplanar and do not intersect. Skew Lines When two lines are not coplanar and do not intersect. Ex 1 AB CD EBCD Parallel Skew

3. Ex 2 U W Planes U and W are Parallel Parallel Planes Two planes that do not intersect.

4. Ex 3 P 13 Parallel Postulate If there is a line, and a point not on the line, then there is exactly one line through the point and parallel to the other line. l P Marks indicate these lines are parallel

5. Ex 4 P 14 Perpendicular Postulate If there is a line, and a point not on the line, then there is exactly one line through the point and perpendicular to the other line. l P

6. Ex 5 Transversal A line that intersects two or more coplanar lines. 1 2 3 4 5 6 7 8

7. Ex 5 TransversalA line that intersects two or more coplanar lines. t 1 2 3 4 5 6 7 8 ∠1 and ∠5 corresponding angles

8. Ex 5 TransversalA line that intersects two or more coplanar lines. t 1 2 3 4 5 6 7 8 ∠1 and ∠5 corresponding angles ∠1 and ∠8 alternate exterior angles

9. Ex 5 TransversalA line that intersects two or more coplanar lines. t 1 2 3 4 5 6 7 8 ∠1 and ∠5 corresponding angles ∠1 and ∠8 alternate exterior angles ∠3 and ∠6 alternate interior angles

10. Ex 5 TransversalA line that intersects two or more coplanar lines. t 1 2 3 4 5 6 7 8 ∠1 and ∠5 corresponding angles ∠1 and ∠8 alternate exterior angles ∠3 and ∠6 alternate interior angles ∠3 and ∠5 consecutive interior angles

11. Do: 1 Assignment: Textbook Page 132, 10 - 26 All Name the corresponding angles: t 1 23 4 5 6 7 8 Name the alternate interior angles: Do: 2 ReviewA _______ is a line that intersects two or more coplanar lines.