URL:https://media.cheggcdn.com/media/3fc/3fc1a151-b616-420c-811c-ff6300236a00/phpibEHmP
掲載元:https://www.chegg.com/homework-help/questions-and-answers/evaluate-c-circle-radius-3-finding-surface-s-c-boundary-orientation-c-counterclockwise-vie-q81178604