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Angle Relationships

Angles created by parallel lines and transversals

TermDefinition
Transversal A line that intersects two or more lines.
Parallel Lines Lines that are always equally spaced apart and will never cross.
Corresponding Angles Angles that are in matching corners or positions.
Vertical Angles The angles opposite each other when two lines cross. They will always be congruent.
Linear Pair Adjacent angles formed by two intersecting lines. They will always have a sum of 180 degrees.
Alternate Interior Angles Angles between the parallel lines that are on opposite sides of the transversal. They will always be congruent.
Alternate Exterior Angles Angles outside the parallel lines that are on opposite sides of the transversal. They will always be congruent.
Same Side Interior Angles Angles between the parallel lines that are on the same side of the transversal. They will always have a sum of 180 degrees. **SOMETIMES CALLED CONSECUTIVE INTERIOR ANGLES**
Same Side Exterior Angles Angles outside the parallel lines that are on the same side of the transversal. They will always have a sum of 180 degrees. **SOMETIMES CALLED CONSECUTIVE EXTERIOR ANGLES**
Created by: haldmar
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