Lines are straight lines that may go for a specific length or infinite. Transversals are the lines which intercept two parallel lines.

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This example shows two parallel lines then one transversal. This demo shows vertical angles, supplementary angles, and alternate interior angles. Vertical angles are the angle on the opposite side of the vertices. Supplementary angles are two angles which add up to 180 degrees. alternate interior angles are angles on alternate sides, on the interior of the parallel lines. A transversal is a line which goes through two (or more) parallel lines. There can also be multiple transversals

[br]Vertical Angles :[br]Vertical Angles are a pair of non-adjacent angles made by a transversal and vertices. [br][br]Corresponding Angles : [br]Corresponding Angles are angles at the same location on the line but in a different section.[br][br]Alternate Exterior Angles:[br]Alternate Exterior Angles are angles on the outside of the transversal on opposite sides[br][br]Alternate Interior Angles :[br]Angles in the interior of the two parallel lines on opposite sides of the transversal.[br][br]

We know that a pair of parallel lines and a transversal create the same angles on both lines where the transversal intersects with the parallel lines.