Transversals

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Same Side Exterior Angles (Definition)

2 exterior angles on the same side of the transversal

Transversal

A line that intersects two or more lines.

Corresponding Angles, must have a diagram

Angles 2 and 6

Alternate Exterior Angles, Must have a diagram

Angles 2 and 7

Alternate Interior Angles, Must have a diagram

Angles 3 and 6

Obtuse angles

Angles greater than 90 degrees

Corresponding Angles (Definition)

Angles in the same position at the two intersections of a transversal

Right Angles

Angles that are exactly 90 degrees

Acute angles

Angles that are less than 90 degrees

Alternate Interior angles and alternate exterior angles are ______ for parallel lines.

Congruent

Parallel Lines

Coplanar lines that do not intersect

Consecutive angles are always __________ .

Supplementary

Vertical Angles (Definition)

Two angles across from each other when two lines cross. (Not Adjacent)

Supplementary Angles (Definition)

Two angles that add to 180 degrees.

Interior Angles

angles on the inside of the lines cut by a transversal

Exterior Angles

angles on the outside of the lines cut by a transversal

Congruent Angles (Definition)

angles with the same measure

Alternate Exterior Angles (Definition)

exterior angles, non-adjacent, and on opposite sides of the transversal

Same-Side Interior Angles (Definition)

interior angles that are on the same side of the transversal and not adjacent

Alternate Interior Angles (Definition)

interior angles, non-adjacent and on opposite sides of the transversal

Another name for consecutive angles is __________ .

same side interior angles

Complementary Angles (Definition)

two angles whose measures have a sum of 90 degrees (corner)

Symbol for angle

∠ , not to be confused with a "less than" sign


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