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.

Builds on

The Pythagorean theorem and similar triangles from Geometry.

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