1.4 Measure and Classify Angles
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Angle Bisector
A ray that divides an angle in to two angles that are congruent.
Straight Angle
An angle that measures 180.
Right Angle
An angle that measures 90.
Acute Angle
An angle that measures between 0 and 90.
Obtuse Angle
An angle that measures between 90 and 180.
Congruent Angles
Angles with the same measure.
Angle
Consists of two different rays with the same endpoint.
Vertex of an Angle
In an angle, the endpoint is called the ____________.
Sides of an Angle
In an angle, the rays are called the _______________.
Measure of an Angle
in <AOB, OA and OB matched one to one with real numbers from 0 to 180. The measure of <AOB is equal to the absolute value of the difference between the real numbers for OA and OB.
