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There are two main ways to label angles: 1. give the angle a name, usually a lower-case letter like a or b, or sometimes a Greek letter like α (alpha) or θ (theta) 2. or by the three letters on the shape that define the angle, with the middle letter being where the angle actually is (its vertex).
Learn about the different types of angles in geometry, such as acute, obtuse, right, straight, reflex and full angles. Find out how to measure, classify and identify angles based on magnitude and rotation.
Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now: https://www.khanacademy.org/math/cc-fourth-grade-math/plane-fig...
Learn about different types of angles based on measurement, direction of rotation, and angle pairs. Find out how to name, measure, and construct angles using protractors and diagrams.
Welcome to Types of Angles with Mr. J! Need help with angles? You're in the right place!Whether you're just starting out, or need a quick refresher, this is ...
In this video, I really just want to introduce you to some terminology for some basic angle types. And the terminology I want to introduce you to are acute angles, right angles, and obtuse angles. And I think when we just go through these, they'll be pretty self-explanatory.
An angle less than 90° is acute. An angle between 90° and 180° is obtuse. An angle greater than 180° and less than 360° is reflex. An angle of exactly 90° is a right-angle.
