1 / 5

Lesson 3-4 Proving lines parallel,

Lesson 3-4 Proving lines parallel,. Postulates and Theorems. Postulate 3-4 – If two lines in a plane are cut by a transversal so that corresponding angles are congruent, then the lines are parallel.

Download Presentation

Lesson 3-4 Proving lines parallel,

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. Lesson 3-4 Proving lines parallel,

  2. Postulates and Theorems • Postulate 3-4 – If two lines in a plane are cut by a transversal so that corresponding angles are congruent, then the lines are parallel. • Postulate 3-5 – If there is a line and a point not on the line, then there exists exactly one line through the point that is parallel to the given line • Theorem 3-5 - If two lines in a plane are cut by a transversal so that a pair of alternate exterior angles are congruent, then the lines are parallel.

  3. Postulates and Theorems • Theorem 3-6 - If two lines in a plane are cut by a transversal so that a pair of consecutive interior angles are supplementary, then the lines are parallel • Theorem 3-7 - If two lines in a plane are cut by a transversal so that a pair of alternate interior angles are congruent, then the lines are parallel • Theorem 3-8 – In a plane, if two lines are perpendicular to the same line, then they are parallel.

  4. l S V p (3x – 4)° U T B (12x – 11)° Notes • Find the value of x and

  5. l S V p (9x – 11)° U T B (8x +4)° Notes • Find the value of x and

More Related