3.5 Properties of Parallel Lines

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3.5 Properties of Parallel Lines
Geometry Quiz 3.4
2. If two lines intersect to form a pair of
adjacent congruent
angles, the lines are
_______________.
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(No Transcript)
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3.5 Properties of Parallel Lines
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Corresponding Angles Postulate
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If two parallel lines are cut by a transversal,
then the pairs of corresponding angles are
congruent.
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Corresponding Angles Postulate
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If two parallel lines are cut by a transversal,
then the pairs of corresponding angles are
congruent.
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Alternate Interior Angles Theorem
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If two parallel lines are cut by a transversal,
then the pairs of alternate interior angles are
congruent.
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Consecutive Interior Angles Theorem
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If two parallel lines are cut by a transversal,
then the pairs of consecutive interior angles are
supplementary.
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3.5 Properties of Parallel Lines
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Alternate Exterior Angles Theorem
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If two parallel lines are cut by a transversal,
then the pairs of alternate exterior angles are
congruent.
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Perpendicular Transversal Theorem
If a transversal is perpendicular to one of two
parallel lines, then it is perpendicular to the
second.
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3.5 Properties of Parallel Lines
QED