This presentation has the basic information about the elements of a circumference.
This website explains the angles of a circumference
http://www.regentsprep.org/regents/math/geometry/gp15/circleangles.htm
This presentation has the basic information about the elements of a circumference.
This website explains the angles of a circumference
http://www.regentsprep.org/regents/math/geometry/gp15/circleangles.htm