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Free Math Study Group
Angles
Definition of an angle
Interior of an angle
Angle measure
Degrees, minutes, seconds
The protractor
Using a protractor to measure angles
Using a protractor to draw angles
Radians
Types of angle
Acute angle
Obtuse angle
Right angle
Straight angle
Reflex angle
Full angle
Quiz: Test your knowledge of angle types
Angle relationships
Adjacent angles
Included angle
Supplementary angles
A linear pair
Complementary angles
Angle bisector
Vertical angles
Subtended angles
Angles around a transversal
(See also
Parallel lines chapter)
Corresponding angles
Alternate interior angles
Alternate exterior angles
Interior angles of a transversal
Exterior angles of a transversal
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