Angles and Twelfths
We can use a fraction circle divided in twelfths to measure lots of different angles by seeing how many twelfths fit into the angle.
When you press the "show me how" button, you can see how the fraction circle can be compared to the angle. The part of the circle that matches the angle will be entered into the "twelfth" text box.
Click "my turn" if you want to try matching the same angle again. Click "next" to try a new angle.