# Trigonometry of right triangles

First, here is a place where you can find videos on review of geometry.

The Trigonometry overview page is here.

1. $\rhd$ Basic geometry  (12:10) Sal draws several right triangles and defines the trigonometric ratios for those triangles.
2. $\rhd$ Solving right triangles (for a side)  (7:04) A video example of finding an unknown side of a right triangle.
3. $\rhd$ Solving right triangles (for a side)  A written example of finding an unknown side of a right triangle.
4. $\rhd$ Solving right triangles (for an angle) A written introduction to inverse trigonometric functions, which can be used to find an unknown angle of a right triangle.
5. $\rhd$ Applications of static geometry (modeling with right triangles)  (4:34) Right triangle word problem with an alien and the Eiffel tower!
6. $\rhd$ Applications of static geometry (similar triangles (8:56) Similar triangles!  One of the most important ideas about triangle and trigonometric functions.