An angle is formed by two rays with the same endpoint. It measures the amount of rotation between these rays and is usually measured in degrees or radians.
Think of an angle as your body turning while dancing. The angle measures how much you turn from your starting position to your final position.
Vertex: The common endpoint of two rays forming an angle.
Degree Measure: A unit for measuring angles based on dividing one complete revolution into 360 equal parts.
Radian Measure: A unit for measuring angles based on the radius of a circle. One radian is equal to the central angle subtended by an arc with length equal to the radius.
Study guides for the entire semester
200k practice questions
Glossary of 50k key terms - memorize important vocab
© 2024 Fiveable Inc. All rights reserved.
AP® and SAT® are trademarks registered by the College Board, which is not affiliated with, and does not endorse this website.