Included in this package is a set of guided notes (12 pages in length) and answer key for the beginning of a Circles unit in Geometry. Lessons include parts of circles (identifying and naming), tangent-radius theorem, two-tangent theorem, radius-chord theorem, and angle-arc relationships (including central, inscribed, tangent-chord, chord-chord, secant-secant, secant-tangent, tangent-tangent). Included in each lesson are "You Try!" questions to be used for formative assessment. I typically go