How to construct a perpendicular line at a point on a line.
How to describe and label point, line, and plane. How to define coplanar and collinear.
How to define and label a line segment.
How to find the shortest distance between a point and 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 take the converse of the parallel lines theorem.
How to define point of concurrency; how to identify the four main points of concurrency in triangles.
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 duplicate a line segment using a compass and straightedge.
How to construct parallel lines using three different methods.
How to define a tangent line; how to determine the angle a radius to a tangent forms.
How to define and identify vertical angles.
How to define corresponding angles and their special properties.
How to construct the incenter using a compass and straightedge.
How to construct the orthocenter of a triangle.
How to identify, define, and label rays and opposite rays.
How to construct the circumcenter using a compass and straightedge.
How to define rotational symmetry and identify the degree of rotational symmetry of common regular polygons.