Pythagoras and right-triangle trigonometry

What this note covers

1. Recognising right triangles and Pythagoras’ theorem
2. Choosing sine, cosine or tangent
3. Finding missing sides with trigonometry
4. Finding angles with inverse trigonometry
5. Angles of elevation and depression
6. Multi-step right-triangle applications
7. Worked ramp: Pythagoras, gradient and design revision
8. Worked sight line: elevation, depression and a two-position check

8 sections · 10 key terms & formulas · 6 common mistakes