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Introduction to Angles

Basic terms related to the classification of angles.

Right AngleAn angle that measures exactly 90 degrees
Straight AngleAn angle that measures exactly 180 degrees
Acute AngleAn angle that measures less than 90 degrees
Obtuse AngleAn angle that measures between 90 and 180 degrees
Congruent AnglesTwo angles that have the same measure
VertexThe endpoint where two rays meet, forming an angle
BisectTo separate an angle into two congruent angles
DegreesThe unit that angles are measured by

Elizabeth Edwards

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