Your search for solving triangles returned 2 hits:
"Solving" a triangle is where they give you a side and an angle of a right triangle, and you have to use SohCahToa (sine, cosine & tangent) to get the remaining sides and angle. Why not use Pythagorean, you ask? Because in trig problems they only give you one side. Teachers are tricky, I'm telling you!
With this chapter we'll start trig off on the right foot -- triangles -- which has worked great for my tutoring students over the years. Also covered: what SohCahToa is (other than a weird abbreviation for the sinusoidal functions); what opposite, adjacent, and hypotenuse mean; how to find sine, cosine and tangent; and how to work a bunch of "solving triangles" problems.
If you do not have an account, you should get one, because it is awesome! You can save a playlist for each test or each chapter, and save your "greatest hits" into a "watch right before the final" list (not that we recommend cramming, but when in Rome...)