Equations and slopes of horizontal and vertical lines
How to define rotational symmetry and identify the degree of rotational symmetry of common regular polygons.
How to identify and describe reflectional symmetry.
How to define and identify vertical angles.
How to find the vertex and axis of symmetry of a parabola.
How to define and label a line segment.
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 identify parallel lines, a line parallel to a plane, and two parallel planes.
How to use standard form of a line.
How to use one-sided limits to find a vertical asymptote.
How to take the converse of the parallel lines theorem.
How to find the vector and parametric equations of a line when given two points on the line.
How to find the angle of inclination of a line.
How to use point-slope form of a line.
How to find the shortest distance between a point and a line.