Which Undefined Term is Used to Define an Angle?

There is no definitive answer to this question as there are a variety of undefined terms that could be used to define an angle. Some of the more common terms that could be used include ‘arc’ or ‘radian’, though there are many others that could also be used depending on the specific context. Ultimately, it is up to the individual defining the angle to choose which undefined term they feel is most appropriate.

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