EducationAngle Relationships - Parallel Lines Cut by a Transversal
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How can I determine the relationship between angles formed when parallel lines are cut by a transversal?

               
 
Are both angles interior (in between the parallel lines)?
NO
Are they both exterior (outside the parallel lines)?
NO
Are they in the same position
YES
They are corresponding angles.



YES


YES



NO

They are same-side interior angles.
YES
Are they on the same side of the transversal?
Are they on the same side of the transversal?
YES
There is no relationship
There is no relationship.



NO


NO




 
They are alternate interior angles.
They are alternate exterior angles