How to form sentences with parallel structure.
The structure of the atom.
The structure of plants.
How to identify parallel lines, a line parallel to a plane, and two parallel planes.
How resistors in parallel affect current flow
How capacitors in parallel affect current flow.
An introduction to the structure of DNA.
An introduction to the structure of RNA.
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 does Congress represent the will of the people and the interests of the nation?
How to determine whether lines are parallel, perpendicular, or neither.
How to prove two triangles are similar using a line parallel to a base.
How to determine whether two lines in space are parallel or perpendicular.