Math K-Plus

An Angle Results From The Intersection Of Two Rays At The Vertex

Below Are The Details Of An Angle In Geometry

The following are the unique characteristics of Angle In Geometery.
  • A Angle is created when two Rays intersect called the vertex. See diagram below; intersection of rays (Line) AB and AC for vertex A.
  • The intersection of the two rays is called the Vertex.
  • There is a standard method of labeling angles. First label the vertex; we choose to label it A. The two rays are labeled Points B and C.
  • The Degree of the angle between two Rays is determined by the space between the rays. See diagram below. One ray is horizontal thus giving us a reference point. The distance of separation between Rays B and C determines the angle's value.
  • Is there a standard way of writing an angle as a mathematical expression? The answer is yes. Here are the details: (1) All angles must start with the character. (2) The vertex must be the center label when writing an angle. (3) Valid angle statements in this example are ∠BAC and ∠CAB.


There are many types of angles: