Identifying and Classifying Angles
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supplementary angle
2 angles whose sum is 180 degrees
angle
A figure formed by two rays with a common endpoint
vertical angles
A pair of opposite congruent angles formed by intersecting lines
obtuse angle
An angle between 90 and 180 degrees
straight angle
An angle of 180 degrees
acute angle
An angle that is less than 90 degrees
adjacent angles
Angles that have a common side and a common vertex (corner point).
congruent angles
Angles that have the same measure
complementary angle
Two angles whose sum is 90 degrees
vertex
point of intersection of two sides of an angle. Plural: vertices