Ch 3.3Standard 7.0:

Students prove and use theorems involving the properties of parallel lines cut by a

transversal

Objective:1) To relate parallel & perpendicular lines.

Theorems

HYPOTHESIS CONCLUSION

Please click on the following link (or copy & paste into your browser) to access an interactive activity pertaining to parallel & perpendicular lines.

http://glencoe.com/sites/common_assets/mathematics/geom_2010/math_in_motion/chapter_openers/GM_10_CO_03/course_player.html

Activity

Example 1 Write a two-column proof.

Given: r || s, 1 2

Prove: r t

Statements Reasons

2. 2 3

3. 1 3 3. Trans. Prop. of

2. Corr. s Post.

1. r || s, 1 2 1. Given

4. r t 4. 2 intersecting lines form lin. pair of s lines .

Example 2 Write a two-column proof.

Given:

Prove:

Statements Reasons

3. Given

2. Conv. of Alt. Int. Angles Thm

1. EHF HFG 1. Given

4. Perpendicular Transversal Theorem

3.

4.

2.