get materials! 01...
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Get Materials!Get Materials!
01 595857565554535251504948474645444342414039383736353433323130292827262524232221201918171615141312111009080706050403020100Get Materials!Get Materials!
Get Materials!Get Materials!
00 595857565554535251504948474645444342414039383736353433323130292827262524232221201918171615141312111009080706050403020100
Homework Answers…Questions?1. 2 – vertical, 5 – corresponding, 6 – alt. ext. 2. 6 – vertical, 4 – corresponding, 2 - alt. int.3. 2 – vertical, 4 – corresponding4. 6 – vertical, 11 & 4 – corresponding, 9 & 2 – alt.
int., 13 & 15 – corresponding to 2 & 115. 1 = 45o (alt. int.)2 = 135o (linear pair)6. 1 = 65o (same-side ext.) 2 = 115o
(corresponding)7. 1 = 95o (alt. int.)2 = 130o (same-side int.)8. a) measure of angle 1 = 105o
b) same-side interior
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
Warm up in pairs Title classwork 2.1.5 Classwork
Complete textbook pg 92 # 38
Together Now! Turn to page 93 #43 Volunteers to read?
Use those theorems in reverse! #44
44A)
44B)
44C)
44D)
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 // nwould read m is parallel to n.
m
n
Prove these lines are parallel! (#45)
Hooray!
If we got here before the bell, then we all get a break!
Somebody’s 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
Answers to 47a
Answers continued
47b)
47c)
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.
Practice makes perfect! Complete #51 with your partner. I will have a pair share answers on the
board.
Homework
Textbook pg 97 #52 all If you want full credit:
-set up an equation
-show work
-solve for x