How to use the hypotenuse leg shortcut to determine the congruence of right triangles.
How to use inverse trig functions to find angles in right triangles.
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 define the sine ratio and identify the sine of an angle in a right triangle.
How to define the cosine ratio and identify the cosine of an angle in a right triangle.
How to define the tangent ratio and identify the tangent of an angle in a right triangle.
How to label an angle and how to differentiate between acute, right, obtuse, and straight angles.
How to calculate the hypotenuse in a right triangle given the lengths of the legs using the Pythagorean Theorem.
How to find a two-sided limit by investigating one-sided limits.
How to define the derivative function f'(x).