Angle rules

What you'll learn

1. 1

   Imagine a door opening. The hinge makes an angle that gets bigger as the door opens wider! 🚪

2. 2

   How many degrees is a straight line? 🤔

3. 3

   Drag the protractor to measure this angle — it's on a straight line! 📐

4. 4

   Two angles on a straight line add up to 180°. Let's find the missing one. 📝

5. 5

   If one angle on a straight line is 50°, what is the other? 🧐

6. 6

   Now try it yourself! Find the missing angle on this straight line. 🎯

7. 7

   What is the rule for angles on a straight line? 💡