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.

**Naming Angles**

**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**

classifying Angles

measuring Angles