How to define a secant; how to find the length of various secants in circles.
How we measure airspeed, wind, groundspeed, and other variables in navigation.
Understanding how to measure the heat from a chemical reaction using a bomb calorimeter.
How to classify a triangle based on its side lengths and angle measures.
How to find the measure of one angle in any equiangular or regular polygon.
How do we measure sine and cosine of pi/4?
How to find the sum of the exterior angles in a polygon and find the measure of one exterior angle in an equiangular polygon.
How we define sine and cosine for all angle measures using the unit circle.