How to define the tangent function for all angles.
How to use the hypotenuse leg shortcut to determine the congruence of right triangles.
How do we measure sine and cosine of pi/4?
How to classify a triangle based on its side lengths and angle measures.
How to define an altitude and draw them on acute, right, and obtuse triangles.
How to label the parts of a prism, how to distinguish between an oblique and a right prism.
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 calculate the hypotenuse in a right triangle given the lengths of the legs using the Pythagorean Theorem.
How to identify a segment from the vertex angle in an isosceles triangle to the opposite side.
How to relate corresponding altitudes, medians and angle bisectors in similar triangles.
How we define sine and cosine for all angle measures using the unit circle.
How to use the ASA and AAS shortcuts to determine the congruence of two triangles.
How to determine whether lines are parallel, perpendicular, or neither.
How to define isosceles triangles, their components and how to determine their properties.
How to evaluate the tangent of 3*pi/4.