Parallel lines angles question
Definitions
A transversal is a line that interesects two or more lines.
Alternate interior angles are two non adjacent interior angles on opposite sides of a transversal.
Alternate exterior angles are two non adjacent exterior angles on opposite sides of a transversal.
Corresponding angles are two non adjacent exterior angles on the same side of a transversal such that one is an exterior angle and the other is an interior angle.
Same side interior angles are two non adjacent interior angles on the same side of a transversal.
Linear pairs are two adjacent angles which are supplementary ( are pairs of angles that add up to 180 degrees).
Vertical angles are two non adjacent angles formed by a pair of intersecting lines that share a vertex.
Also holds the following propositions:
If two parallel lines are cut by a transversal, the alternate interior angles are congruent.
If two lines are cut by a transversal and the alternate interior angles are congruent, the lines are parallel.
If two parallel lines are cut by a transversal, the alternate exterior angles are congruent.
If two lines are cut by a transversal and the alternate exterior angles are congruent, the lines are parallel.
If two parallel lines are cut by a transversal, the corresponding angles are congruent.
If two lines are cut by a transversal and the corresponding angles are congruent, the lines are parallel.
If two parallel lines are cut by a transversal, the interior angles on the same side of the transversal are supplementary.
If two lines are cut by a transversal and the interior angles on the same side of the transversal are supplementary, the lines are parallel.
If two angles form a linear pair, they are supplementary.
Vertical angles are congruent.
So, regarding to your question the two angles are supplementary
Hope these help!!
Last edited by kadence; 07-27-2013 at 01:05 PM.
Thank you for your detailed answer!!
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