# alternate interior angles by eaz13803

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• pg 1
September 29, 2009

3-1 Quizzy Poo !
1       2
n   1. Complete: __________ and 4 are
4       3
5       6              alternate interior angles.
m
8       7
2. Complete: __________ and 8 are
corresponding angles.

3. Suppose the m 3 = 37. Find the m 6.

4. Suppose that m 1 = x + 12 and m 5 = 3x - 36.
Find x.
September 29, 2009

3-2 Proving Lines Parallel
complete the Quick Checks 1-3.

Today's Vocabulary:

flow proof
September 29, 2009

Postulates and Theorems
September 29, 2009

Using Theorems 3-5 and 3-6:
Which lines, if any, must be parallel if   3 and      2
are supplementary?
September 29, 2009

More Theorems
September 29, 2009

Using Algebra:
Find the value of x for which l m.

l
(14 + 3x)                         m
(5x - 66)
September 29, 2009

Closure:
Name the five methods this lesson gives to
prove that two lines are parallel.
Show that corresponding angles are
congruent, alternate interior angles are
congruent, same-side interior angles are
supplementary, alternate exterior angles
are congruent, or same-side exterior
angles are supplementary.
September 29, 2009

Assignment:

Pages 137-140: #'s 1-39 odds, 41-45
all.

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