circle_angle_formulas_lesson.wmv |

Practice angles formed inside the circle here:

http://jmap.org/JMAP/RegentsExamsandQuestions/PDF/WorksheetsByPI-Topic/Geometry/Informal_and_Formal_Proofs/G.G.51.ArcsDeterminedbyAngles1.pdf

Practice angles formed outside the circle here:

http://www.regentsprep.org/Regents/math/geometry/GP15/PcirclesN3.htm