Angles in a triangle
The angles always add up to 180°.
🔍 Step 1 · Understand
First, look at a worked example
In this triangle, two angles measure 55° and 45°. What is the third angle, in degrees?
💡 The tip : The three angles of a triangle always add up to 180°.
🤔 Find the answer in your head, then open the solution.
👀 See the solution✅ The solution
Answer: 80
180 − 55 − 45 = 80°.
🎯 Step 2 · Your turn!
10 questions. Take your time, and ask for a hint if you get stuck.