3.1: Properties of Parallel Lines Flashcards
a line that intersects 2 co-planar lines at 2 distinct points
Transversal
If a transversal intersects 2 parallel lines, then alternate interior angles are congruent
Alternate Interior Angles
If a transversal intersects 2 parallel lines, then same-side interior angles are supplementary
Same-side Interior Angles
If a transversal intersects 2 parallel lines, then corresponding angles are congruent
Corresponding Angles
If a transversal intersects 2 parallel lines, then alternate interior angles are congruent
Two-column Proof
If a transversal intersects 2 parallel lines, then alternate exterior angles are congruent
Alternate Exterior Angles
If a transversal intersects 2 parallel lines, then same-side angles are supplementary
Same-side Exterior Angles