1. Bell Ringer
Simplify each expression q q – 3 2. h + 5h – 3 – 6h 3. b-2(b-2) 4. 12m + 9 – 2m - 16

2. Homework Check

3. Homework Check

4. Vocabulary Pop Quiz
Today, I will let you use your PAPER NOTES to complete the vocabulary pop quiz.
I will give you 5 minutes to complete.

5. Section 11.1 Continued Angle and Line Relationships
R drive > Key > March 9_13 > 11.1__Angle & Line Relationships Cont. File > Save As > P drive > Math > March 9_13 > 11.1__Angle & Line Relationships Cont.

6. Vocabulary
Perpendicular Lines – When two lines intersect to form a right angle

7. Vocabulary Parallel Lines – Two lines that never intersect
Transversal – A line that intersects two or more other lines in a plane

8. Vocabulary
When a transversal intersects two parallel lines, eight angles are formed.
Interior Angles – Angles that lie inside the parallel lines. For example: ∠3, ∠ 4, ∠ 5, ∠ 6
Exterior Angles – Angles that lie outside the parallel lines. For example: ∠ 1, ∠ 2, ∠ 7, ∠ 8

9. Vocabulary
≅ - is congruent to
|| - is parallel to

10. Vocabulary
Alternate Interior Angles – Angles on opposite sides of the transversal and inside the parallel lines
Alternate Exterior Angles – Angles on opposite sides of the transversal and outside the parallel lines
Corresponding Angles- Angles in the same position on the parallel lines in relation to the transversal

11. Notes The following pairs of angles are congruent:
Alternate Interior Angles
∠ 3 ≅ ∠ 5, ∠ 4 ≅ ∠ 6
Alternate Exterior Angles
∠ 1 ≅ ∠ 7, ∠ 2 ≅ ∠ 8
Corresponding Angles
∠ 1 ≅ ∠ 5, ∠ 2 ≅ ∠ 6, ∠ 3 ≅ ∠7, ∠ 4 ≅ ∠ 8

12. Example 1 Find Measures of Angles Formed by Parallel Lines

13. Example 2 Find Measures of Angles Formed by Parallel Lines

14. Example 3 Find Measures of Angles Formed by Parallel Lines
Classify the relationship between <9 and <13
If m<13 is 75°, find m<11 and m<15.

15. Example 4 Use Algebra to Find Missing Angle Measures

16. Example 5 Use Algebra to Find Missing Angle Measures

17. Example 6 – Your Turn Use Algebra to Find Missing Angle Measures
Angles DEF and WXY are complementary angles, with m<DEF = 2x and m<WXY = 3x – 20. Find the measures of <DEF and <WXY.

18. Homework Section 11.1 # 4 – 9,

19. Homework Section 11.1 #4 -9,

20. Homework Section 11.1 #4 – 9,

21. Homework Section 11.1 #4 – 9,