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.

Leone Learning Systems, Inc. (LLS) is a North Shore company that provides online courses for kids anywhere and local teaching and tutoring services for students in Chicago and the Northern Suburbs of Chicagoland. LLS also provides a free geometry software package for children age 6 and up, and free resources for teachers and parents. This site includes information about classes taught, availability for tutoring, learning activities for kids, lesson plans, and an ongoing software and curriculum research and development effort.