Trigonometry · Unit 1

Right-Triangle Trigonometry

Three ratios that unlock every right triangle: name the sides, pick the ratio, and solve for any missing side or angle — then aim it at towers, cliffs, and shadows.

Lessons
  1. 01The Three Ratios
  2. 02Finding Missing Sides
  3. 03Finding Missing Angles
  4. 04Angles of Elevation & Depression
Ready to check yourself?