Upcoming SlideShare
×

# Proving Lines Parallel

1,845 views

Published on

Proving Lines Parallel http://teachers.henrico.k12.va.us/math/igo/02PerpendicularParallel/2_5.html

Published in: Education
1 Like
Statistics
Notes
• Full Name
Comment goes here.

Are you sure you want to Yes No
• Be the first to comment

Views
Total views
1,845
On SlideShare
0
From Embeds
0
Number of Embeds
2
Actions
Shares
0
14
0
Likes
1
Embeds 0
No embeds

No notes for slide

### Proving Lines Parallel

1. 1. Lesson 2 - 5 Proving Lines Parallel Lesson 2-5: Proving Lines Parallel
2. 2. Proving Lines Parallel - Postulates & Theorems <ul><li>If two lines are cut by a transversal and corresponding angles are congruent , then the lines are parallel. </li></ul>Lesson 2-5: Proving Lines Parallel
3. 3. Proving Lines Parallel - Postulates &Theorems <ul><li>If two lines are cut by a transversal and alternate interior angles are congruent , then the lines are parallel. </li></ul>Lesson 2-5: Proving Lines Parallel
4. 4. Proving Lines Parallel - Postulates &Theorems <ul><li>If two lines are cut by a transversal and consecutive interior angles are supplementary , then the lines are parallel. </li></ul>Lesson 2-5: Proving Lines Parallel
5. 5. Proving Lines Parallel - Postulates &Theorems <ul><li>If two lines are cut by a transversal and consecutive exterior angles are supplementary , then the lines are parallel. </li></ul>Lesson 2-5: Proving Lines Parallel
6. 6. Examples: Proving Lines Parallel <ul><li>Find the value of x which will make lines a and lines b parallel. </li></ul>Lesson 2-5: Proving Lines Parallel 4. 20° Answers: 1. 20° 2. 50° 3. 90° 2. 1. 3. 4.
7. 7. Ways to Prove Two Lines Parallel <ul><li>Show that corresponding angles are equal. </li></ul><ul><li>Show that alternative interior angles are equal. </li></ul><ul><li>Show that consecutive interior angles are supplementary. </li></ul><ul><li>Show that consecutive exterior angles are supplementary. </li></ul><ul><li>In a plane, show that the lines are perpendicular to the same line. </li></ul>Lesson 2-5: Proving Lines Parallel