Nataliya D. answered 07/22/13
Patient and effective tutor for your most difficult subject.
In Geometry we use term "ray" to define an angle.
Ray is a line with the start point but no end point.
Angle is the figure formed by two rays with the common start point, called the vertex of the angle.
/
A /
/
/
B /
C
Names of given angle are:
/ ABC or / CBA or / B