This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
Fotothek df tg Geometrie Arithmetik Proportion Flche. Scan Deutsche Fotothek dftg color MIKCenter Berlin GmbH Abbildung Nr Nrnberg Tabellen zu den Grundrechenarten Proportionale Streckenteilung Proportionale Vergrerung oder Verkleinerung von Flchen Papier Kupferstich cm Geometrie Arithmetik Proportion Flche ppn Druck Deutsche