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Types of angles

Description:

Types of angles - measurement:

1. Acute angle - an acute angle is an angle measuring between 0° and 90°




2. Right angle - a right angle is an angle measuring exactly 90°


3. Obtuse angle - an angle whose measure is bigger than 90° but less than 180°



4. Straight angle - an angle whose measure is exactly 180°



5. Reflex angle - an angle whose measure is bigger than 180° but less than 360°.
                            - an angle that is greater than 2 right angles and less than 4 right angles.



6. Full rotation - an angle whose measure is exactly 360°






Types of angles - location

1. Complementary Angles - Two angles are called complementary angles if the sum of their degree measurements equals 90 degrees.





2. Supplementary Angles - Two angles are called supplementary angles if the sum of their degree measurements equals 180 degrees.


3. Vertical Angles - For any two lines that meet, such as in the diagram below, angles marked by the letter alpha (or beta) are called vertical angles. Vertical angles have the same degree measurement.



4. Corresponding Angles - For any pair of parallel lines, that are both intersected by a third line, angles marked by the letter alpha called corresponding angles. Corresponding angles have the same degree measurement.



5. Alternate Interior Angles - For any pair of parallel lines, that are both intersected by a third line, angles marked by the letter alpha are called alternate interior angles. Alternate interior angles have the same degree measurement.


6. Alternate Exterior Angles - For any pair of parallel lines, that are both intersected by a third line, angles marked by the letter alpha are called alternate exterior angles. Alternate exterior angles have the same degree measurement.



Author(s):
Wojtek, s21a90r


Sources:
Own knowledge, Net