--similar triangles
--finding an unknown height in a similar triangle
--tangent ratios of varying angles
--hypotenuse, adjacent, and opposite sides
--using a calculator to find the tangent ratio of any angle
--using tangent ratios to find an unknown adjacent or opposite side length
--tangent, sine and cosine ratios
--using a trigonometric ratio to calculate the lengths of the other sides of a right triangle when an angle and one side length are known
--using a trigonometric ratio to calculate an angle of a right triangle when two side lengths are known
--using the mnemonic acronym SOHCAHTOA
