Pythagoras and trigonometry
KS4 · 30 minutes · Find missing sides and angles in right-angled triangles.
Answer by: Type. You can change method or take a break at any time.
Page 1 of 30
Our learning goal
Find missing sides and angles in right-angled triangles.
Your turn: Choose one thing you would like to understand by the end.
Offline speech needs an installed English device voice.
My lesson notes & project
Full teaching script
- Today: Pythagoras and trigonometry. Our goal: Find missing sides and angles in right-angled triangles.
- Take one idea at a time. Pause after each sentence; ask for repetition whenever you need it.
- In a right-angled triangle a² + b² = c², where c is the hypotenuse. For angles use SOH-CAH-TOA: sin = opposite/hypotenuse, cos = adjacent/hypotenuse, tan = opposite/adjacent. Label the triangle before choosing the ratio and you will not go wrong.
- Together: choose one example from the explanation and show how it works. What do you notice?
- Your turn: A ladder 5 m long rests 3 m from a wall. How high does it reach?
- Reflect: what made sense, and what would you like explained differently?
Watch and learn
Videos come only from approved education channels and need internet. Use the arrows in the player for more videos from the same channel.