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Get Materials!

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01 59585756555453525150494847464544434241403938373635343332313029282726252423222120191817161514131211100908070605040302 0100 Get Materials!

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00 595857565554535251504948474645444342414039383736353433323130292827262524232221201918171615141312111009080706050403020100

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Homework Answers…Questions? 1. 2 – vertical, 5 – corresponding, 6 – alt. ext. 2. 6 – vertical, 4 – corresponding, 2 - alt. int. 3. 2 – vertical, 4 – corresponding 4. 6 – vertical, 11 & 4 – corresponding, 9 & 2 – alt. int., 13 & 15 – corresponding to 2 & 11 5. 1 = 45 o (alt. int.)2 = 135 o (linear pair) 6. 1 = 65 o (same-side ext.)2 = 115 o (corresponding) 7. 1 = 95 o (alt. int.)2 = 130 o (same-side int.) 8. a) measure of angle 1 = 105 o b) same-side interior

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Why does it matter? Light technology and Mirror Reflection What are we learning today? Proving lines are parallel (the converses of the angle theorems) Section 2.1.5

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Warm up in pairs Title classwork 2.1.5 Classwork Complete textbook pg 92 # 38

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Together Now! Turn to page 93 #43 Volunteers to read?

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Use those theorems in reverse! #44 44A) 44B) 44C) 44D)

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Converses and Parallel Notation Converse – switch the If and then in a theorem The notation for parallel lines are 2 slashes between the lines that are parallel Example: m // n would read m is parallel to n. m n

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Prove these lines are parallel! (#45)

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Hooray! If we got here before the bell, then we all get a break!

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Somebodys Watching Me part 2 Read # 46 together for set up Complete #47 with your partner using the angle I assign you Copy the diagram onto your classwork when filling in angles

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Answers to 47a

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Answers continued 47b) 47c)

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Putting it all together. #49) Calculate the measures of x, y, and z. Justify each answer with the name of a geometric relationship from your toolkit.

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Practice makes perfect! Complete #51 with your partner. I will have a pair share answers on the board.

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Homework Textbook pg 97 #52 all If you want full credit: -set up an equation -show work -solve for x

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Warm Up Identify each angle pair. 1. 1 and 3 2. 3 and 6

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