Evaluate each expression if a = 11, b = -1, and c = -8 Bell Ringer * Bell Ringers will be review from here on out to help prepare you for the placement test and the ACT Aspire. I will not answer questions about the Bell Ringer. You may use notes to help you, but everything will be review so you should know it. Evaluate each expression if a = 11, b = -1, and c = -8 1. a – 14 2. -5 – c 3. a – (-7) 4. c - b

Let’s talk about how you did on your 3rd 9 Weeks Test. How Did you Do? Let’s talk about how you did on your 3rd 9 Weeks Test.

New 9 Weeks/New Bathroom Passes If you were absent yesterday, turn in your old ones to me!!

Section 11.1 Angle and Line Relationships R drive > Key > March 9_13 > 11.1_Angle & Line Relationships File > Save As > P drive > Math > March 9_13 > 11. 1_Angle & Line Relationships *If you would like to, you may create a New Folder called 3rd 9 Weeks and move everything from Jan until now into that folder. *You may throw away anything EXCEPT STUDY GUIDES from 3rd 9 weeks from your binder. This must be done AT HOME, NOT HERE.

Introduction Pairs of angles can be classified by their relationship to each other. This is a very vocabulary heavy section. Expect vocabulary on EVERY test and quiz. Keep up with this vocabulary EVERY DAY!!! I want it somewhere easy for you to grab and use. Expect pop quizzes.

Vocabulary Vertical Angles – Two pairs of opposite angles formed by two intersecting lines. The angles formed are congruent.

Vocabulary Adjacent Angles – Two angles that are “side by side”, share a common ray, and do not overlap

These are examples of adjacent angles. 45º 80º 35º 55º 130º 50º 85º 20º

These angles are NOT adjacent. 100º 50º 35º 35º 55º 45º

Vocabulary Supplementary Angles – When the sum of two angles adds up to 180 ˚.

Vocabulary Complementary Angles- When the sum of 2 angles adds up to 90˚.

Practice Time!

Directions: Identify each pair of angles as vertical, supplementary, complementary, or none of the above.

#1 120º 60º

#2 60º 30º

#3 75º 75º

#4 60º 40º

#5 60º 60º

#6 135º 45º

#7 25º 65º

#8 90º 50º

Directions Determine the missing angle

#1 ?º 45º

#2 ?º 65º

#3 ?º 35º

#4 ?º 50º

#5 ?º 140º

#6 ?º 40º

Example 1 Find a Missing Angle Measure

Example 2 Find a Missing Angle Measure

Example 3 Find a Missing Angle Measure Classify the relationship of ∠a and ∠b. If m∠a = 53˚, what is the measure of ∠b?

Homework Section 11.1 #1-3, 10-12, 1-4

Homework Section 11.1 #1-3, 10-12, 1-4