Pythagoras' theorem

What you'll learn

1. 1

   Imagine a right-angled triangle drawn on a football pitch. The two shorter sides meet at a corner — that's the right angle. 🔺

2. 2

   Build a right-angled triangle with sides 3, 4 and 5. Watch what happens when you square each side. 🔢

3. 3

   Let's check the 3-4-5 triangle. Does 3² + 4² = 5²? Let's find out! 📐

4. 4

   Now try a 5-12-13 triangle. Do the squares add up? 🧮

5. 5

   In a right-angled triangle, what is the name of the longest side?

6. 6

   Use the formula a² + b² = c² to find the missing side when a = 6 and b = 8. 🧠

7. 7

   If a = 6 and b = 8, what is c²? (Hint: 6² + 8² = ?)