Unit 3: Circles and Volume - Mr. Mooney: Geometry Mr. Mooney: Geometry. Search this site. CCGPS Analytic Geometry Fall 2013. Extra Materials. Post EOCT Projects. Circle Vocab Notes - Key 11/14 Day 69: Circles Test (Unit 3 minus 3D figures) Unit 3 - Ms. Smith's Geometry Website Common Core Standards for Unit 3. MCC9-12.G.C.1 Prove that all circles are similar. MCC9-12.G.C.2 Identify and describe relationships among inscribed angles, radii, and chords. Include the relationship between central, inscribed, and circumscribed angles; inscribed angles on a diameter are right angles; the radius of a circle is perpendicular to..