This activity is also part of one or more other Books. Modifications will be visible in all these Books. Do you want to modify the original activity or create your own copy for this Book instead?
This activity was created by '{$1}'. Do you want to modify the original activity or create your own copy instead?
This activity was created by '{$1}' and you lack the permission to edit it. Do you want to create your own copy instead and add it to the book?
A Tangent to a Circle
Rotate Point B around the circle. Move point C to change the size of the circle.
Pay attention to the angle between the radius and the tangent.
What is the angle between the radius and the tangent?