https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/13954468Edit ImageSaveSaveEditCropCustom TextA middle-aged man giving a geometry lesson to young woman, a young man [her suitor] hides behind a large globe. Coloured lithograph.Original public domain image from Wellcome CollectionMorePublic DomainFree CC0 image for Personal and Business useInfoView CC0 LicenseJPEGSmall JPEG 961 x 1200 px | 300 dpiLarge JPEG 2373 x 2963 px | 300 dpiFree DownloadA middle-aged man giving a geometry lesson to young woman, a young man [her suitor] hides behind a large globe. Coloured lithograph.More