Angles in triangles and on a straight line

What you'll learn

1. 1

   Imagine you have three pencils. You join them end to end to make a triangle. The corners where they meet are called angles. 🖊️

2. 2

   How many angles does a triangle have? 🤔

3. 3

   Let's find a missing angle in a triangle. 🧩

4. 4

   Drag the protractor to measure this angle in a triangle. 🎯

5. 5

   What do all three angles in a triangle add up to? ✨

6. 6

   Now try a straight line angle. 📏

7. 7

   If one angle on a straight line is 45°, what is the other? 🧮