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Parallel Lines Cut by a Transversal

Acute angles
The acute angles that are formed are all congruent.

Obtuse Angles
The obtuse angles are all congruent above 90 degrees and below 90 degreees. Any acute angle is suplementary to any obtuse angle.
Congruent
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Vertical
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Alternate Interior
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Corresponding
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Alternate Exterior
Verticle

Alternate Interior

Supplementary
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Same Side Interior
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Same Side Exterior
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Adjacent (liner pair)

Same Side Interior
Corresponding

Alternate Exterior

Same Side Exterior

Adjacent (linear Pair)

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