When two lines meet (or intersect) at a point, then an angle is
formed. The point of intersection of the lines is called the vertex.
Lines AB and AC meet at the point A to form an angle. The point A is the
vertex of the angle, and the lines that meet to make the angle are called the
arms of the angle.
An angle is name by using the names of the points on the arms,
with name of the vertex in the middle. The symbol used to
represent an angle is
For example: the angle above could be named as