Circle Theorem Lab

Using it in class

1. Start on configuration 01 and press “Walk B round”. The two numbers change together the whole way; ask the class what stays the same before you say it.
2. Keep walking until the banner turns amber. That is B crossing onto the other arc, and the relationship becomes θ = 360° − 2α. The exception is worth more than the rule.
3. Hand the device round. A point dragged by a student is a point they believe; a diagram on a slide is one they copy.
4. Full screen hides everything but the circle, so it reads from the back of the room.