You can make a beam compass out or tie one end of a string to a nail and the other to a pencil, draw your circle, and cut freehand with a tool like a jigsaw or even (shudder) a handsaw.
Whether you draw them by hand or try to achieve that perfect circle with a tool, they are not always ... sets the center ...
Google expands AI Overviews in Circle to Search, enabling instant insights from visual content on Android devices.