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.
Square triangle sum . en Maksim page en The square number as sum of two triangular numbers Created by User Fredrik Part of the series Image Square triangle sum Image Square triangle sum Square numbers number date username edit summary November en User Fredrik no to be added to be added
Page 2023 Free-images.com. All images are Public Domain