Links to regents prep central & inscribed angles in circles

link to inscribed angles:

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

link to arcs in circles:
http://www.regentsprep.org/Regents/math/geometry/GP15/CircleArcs.htm

link to equations of circles:
http://www.regentsprep.org/Regents/math/geometry/GCG6/LCir.htm

link to tangents in circles:
http://www.regentsprep.org/Regents/math/geometry/GP14/TanCircles.htm

link to chords in circles:
http://www.regentsprep.org/Regents/math/geometry/GP14/CircleChords.htm

link to length of segments in circles: intersecting chords, secant-secant, tangent-secant:
http://www.regentsprep.org/Regents/math/geometry/GP14/CircleSegments.htm