This is the "3.4: Proving Lines are Parallel" page of the "Geometry Chapter 3" guide.
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Geometry Chapter 3   Tags: geometry, mahlman, math  

Last Updated: Feb 19, 2014 URL: http://libguides.mpsaz.net/content.php?pid=109598 Print Guide RSS Updates

3.4: Proving Lines are Parallel Print Page
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Theorems

Corresponding Angles Converse

Alternate Interior Angles Converse

Alternate Exterior Angle Converse

Consecutive Interior Angles Converse

If two lines are cut by a transversal so that CA are congruent, then the lines are parallel, then the lines are parallel. If two lines are cut by a transversal so that AIA are congruent, then the lines are parallel. If two lines are cut by a transversal so that AEA are congruent, then the lines are parallel. If two lines are cut by a transversal so that CIA are Supplementary, then the lines are parallel.

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If: m<A = m <B,

Then: line h and h' are Parallel.

If: m<A = m<D

Then: the lines are parallel.

If: m<2 = m<7

Then: Lines a and b are parallel.

If: m<d + m<e = 180

then: the two lines are parallel.

 

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