KingMathPythagoras' theorem
Find a length in a right-angled triangle.
🔍 Step 1 · Understand
First, look at a worked example
Triangle ABC has a right angle at A, with AB = 7 cm and AC = 24 cm. How long is BC, in cm?
💡 The tip : Pythagoras' theorem: BC² = AB² + AC².
🤔 Find the answer in your head, then open the solution.
👀 See the solution✅ The solution
Answer: 25
BC² = 7² + 24² = 49 + 576 = 625, so BC = √625 = 25 cm.
🎯 Step 2 · Your turn!
10 questions. Take your time, and ask for a hint if you get stuck.