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Angle, Ray, Vertex
Below Are The Detailed Definitions Of Angles
The following are the unique characteristics of any
Angle
.
A
Angle
is created when two
Rays
intersect. 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
.
See More About Angles