27 questions all stuffed in to the same circle gives students a real challenge. This puzzle is great for any high school geometry lesson on circles. It contains angles with their vertex in the circle, on the circle, and outside of the circle. These angles are all made using diameters, chords, secants and tangents.
Ptolemy of Alexandria compiled a more extensive table of chords in his book on astronomy, giving the value of the chord for angles ranging from 1/2 degree to 180 degrees by increments of half a degree. The circle was of diameter 120, and the chord lengths are accurate to two base-60 digits after the integer part
Arcs and Chords in Circles Theorem Foldable for the Geometry Interactive Notebook
Circles: inscribed angles - foldable for interactive notebooks
This is a foldable for notes on Inscribed Angles of Circles. The notes include properties of inscribed angles and tangent lines and chords and 9 examples. This also includes the SMART NOTEBOOK file with the foldable. Also this includes a set of 8 practice problems on a half sheet for interactive notebook.