This pattern caught my eye in Porte de Hal, an old city gate turned museum in Brussels. What do you notice? What do you wonder? #NoticeWonder
definitely feels like it’s got potential to nerdsnipe @alisonkiddle into making it in GeoGebra!
@peterrowlett ooh! Alas I'm on a train and my laptop is about to die but there's a high likelihood I will try and draw this in Geogebra when I'm home and rested
@peterrowlett hyperbolic geodesics?