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Obtuse Angle
What Is An Obtuse Angle?
The following are the unique geometric characteristics of any
Obtuse Angle
.
A angle is created when two rays intersect.
The intersection of the two rays is called the vertex.
There is a standard method of labeling any angle. 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 obtuse angle's value.
Is there a standard way of writing this type of 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 obtuse angle statements in this example are
∠BAC
and
∠CAB
.
An obtuse angle is always greater than 90° but less than 180°. In the example below.
See More About Angles