How can I determine the relationship between angles formed when parallel lines are cut by a transversal?
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Are both angles interior (in between the parallel lines)?
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NO
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Are they both exterior (outside the parallel lines)?
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NO
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Are they in the same position
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YES
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They are corresponding angles.
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YES
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YES
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NO
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They are same-side interior angles.
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YES
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Are they on the same side of the transversal?
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Are they on the same side of the transversal?
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YES
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There is no relationship
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There is no relationship.
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NO
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NO
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They are alternate interior angles.
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They are alternate exterior angles
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Angle Relationships - Parallel Lines Cut by a Transversal
