2.1 & 2.2 - Exploring Parallel Lines & Angles Formed by Parallel Lines
Corresponding angles
Angles in the same place on different lines; they must be on the same side of the transversal, but one is exterior, and the other is interior
Alternating interior angles
Angles on opposite sides of the transversal and are inside the lines
Alternating exterior angles
Angles on opposite sides of the transversal and are outside the lines
Adjacent angles
Angles that have a common side and a common vertex (corner point)
Consecutive/adjacent interior angles
Angles which share the same side of the transversal and are inside the lines
Consecutive/adjacent exterior angles
Angles which share the same side of the transversal and are outside the lines
Exterior angle of a polygon
The angle that is formed by a side of a polygon and the extension of an adjacent side
Supplementary angles
Two angles whose sum is 180 degrees
Vertical angles
Two nonadjacent angles formed by two intersecting lines; they are equal
Transversal
A line that intersects two or more lines at different points
Linear angles
A pair of adjacent, supplementary angles
Converse
A statement formed by switching the premise and conclusion
When a transversal intersects two parallel lines
The corresponding angles are equal The alternate interior angles are equal The alternate exterior angles are equal The consecutive interior angles are supplementary
Interior
The inner part between the two or more lines intersected by a transversal
Corresponding angles are equal when
The lines intersected by the transversal are parallel
Exterior
The outer parts of the two or more lines