How to relate the sides of an angle bisected and the lengths of the opposite side.
How to identify, define, and label rays and opposite rays.
How to identify all of the special properties of parallelograms and use them to solve problems.
How to identify a segment from the vertex angle in an isosceles triangle to the opposite side.
How to define an altitude and draw them on acute, right, and obtuse triangles.
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 perform and describe a dilation.