A foldable that covers the different angle relationships that exist in a circle: Central, Inscribed, Interior, and Exterior. The formula for how the angles relate to the arcs is given in words, as well as a simplified "equation" with words. For example:
For an exterior angle it states, "If an angle is formed where the vertex is outside of the circle, then the measure of the angle is one half the difference of the intercepted arcs." Then the simplified equation says "angle = 1/2 (diff of arcs)"
For each angle, there is also a blank circle where an example can be given.
When using, make sure to print double sided (flipping on long edge) and then cutting out around the outer edge. You can then cut to create flaps between the four angles or leave them all together.