Identify acute and obtuse angles

What you'll learn

1. 1

   Imagine a door 🚪 that's just a little bit open — that angle is like an acute angle.

2. 2

   Which word means a small angle — like a door barely open? 🚪

3. 3

   Drag the protractor to measure this angle. Is it acute or obtuse?

4. 4

   Let's check this angle together. Is it acute or obtuse?

5. 5

   Now you try — measure this angle and decide.

6. 6

   Is 120° an acute or obtuse angle?

7. 7

   Which angle is acute? 🔍