topic: use parallel lines and transversals and transversals?€¦ · fill out your assignment sheet...
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3 2 Use Parallel Lines and Transversals Brocket revised.notebook
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October 26, 2012
Topic: Use Parallel Lines and Transversals
and transversals?
No Cornell Notes todayFill out your assignment sheetHave your Homework outDo the warm-up on the next page in your notes
3 10/25-10/26W.S. 3.1
GlencoeClasswork
4 10/25-10/26
Notes - Parallel
lines and
transversals
Notes
5 10/25-10/26
Pg 158-160 #
6-11, 13-25,
30-31 all
Homework
3 2 Use Parallel Lines and Transversals Brocket revised.notebook
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Homework Answers
3 2 Use Parallel Lines and Transversals Brocket revised.notebook
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3 2 Use Parallel Lines and Transversals Brocket revised.notebook
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Notes - Parallel Lines and Transversals
0 180
10170
20
160
30
15040
14050
13060
120
70
110
80
100
90
90
0°
100
80
110
70
120
60
130
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140
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150
30
160
20
17010
1800
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On your new Conditionals Table for Chapter 3, Copy down the theorems and postulates on Pgs. 155 and 156 in your textbook.
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If two parallel lines are cut by a transversal, then
1) Corresponding angles are congruent2) Alternate Interior angles are congruent3) Alternate Exterior angles are congruent4) Same-Side Interior angles are supplementary.
Any two angles in this picture have to be congruent or Add to 180 degrees.
Which angles have to be congruent to angle 1?_______________________________________
Which angles have to be congruent to angle 2?
_______________________________________
Are angles <1 and < 5 congruent or supplementary?________________________________________
Are angles <2 and < 8 congruent or supplementary?________________________________________
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6x
4x-20
Example 3
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Find x, y and z
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Prove the Alternate Exterior angle theorem1
2
7
l
m
n
Given: Line m is parallel to Line n
Prove: <1 ≅ <7
Statements Reasons
1) Line m is parallel to Line n 1) _________________________
2) <1 ≅ < 2 2) _________________________
3) <2 ≅ < 7 3) _________________________
4) <1 ≅ < 7 4) _________________________
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Homework: Pg 158-160 # 6-11, 13-25, 30-31 All
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