How to define and label a line segment.
How to duplicate a line segment using a compass and straightedge.
How to write the parametric equations of a line segment that goes from point A to point B.
How to predict the direction of a vector.
How to define direct variation.
How to derive the area of a segment formula.
How to prove two triangles are similar using a line parallel to a base.
How to find the length of tangent segments drawn to a circle from the same point.
How to find the vector and parametric equations of a line when given two points on the line.
How to construct a perpendicular line at a point on a line.
How to mark parallel lines, how to show lines are parallel, and how to compare skew and parallel lines.
How to tell if two variables vary directly.
How to identify parallel lines, a line parallel to a plane, and two parallel planes.
How to use standard form of a line.
How to determine whether two lines in space are parallel or perpendicular.
How to write the vector equation of a line.
How to identify, define and label a midpoint.
How to take the converse of the parallel lines theorem.