How to identify parallel lines, a line parallel to a plane, and two parallel planes.
How to take the converse of the parallel lines theorem.
How to mark parallel lines, how to show lines are parallel, and how to compare skew and parallel lines.
How to prove two triangles are similar using a line parallel to a base.
How to prove that opposite angles in a cyclic quadrilateral are congruent; how to prove that parallel lines create congruent arcs in a circle.
How to construct parallel lines using three different methods.
How to define corresponding angles and their special properties.
How to identify a trapezoid and its special properties.
How to define a triangle midsegment and describe its special properties.
How to define alternate interior angles and their special properties.
How to define alternate exterior angles and their special properties.
How to describe same side interior and same side exterior angles and their special properties.
How to describe a glide reflection and identify the information needed to perform a glide reflection.
How to identify all of the special properties of parallelograms and use them to solve problems.