https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/14000098Edit ImageSaveSaveEditCropCustom TextA mathematician, using dividers to measure a diagram on a piece of paper. Engraving.Original public domain image from Wellcome CollectionMorePublic DomainFree CC0 image for Personal and Business useInfoView CC0 LicenseJPEGSmall JPEG 957 x 1200 px | 300 dpiLarge JPEG 2361 x 2961 px | 300 dpiFree DownloadA mathematician, using dividers to measure a diagram on a piece of paper. Engraving.More