We construct a pattern from the original doors of the Hall of the Two Sisters in Alhambra using GeoGebra Classic 5.
GeoGebra can be downloaded for free at geogebra.org/download (scroll down for the link to download version 5 for advanced mathematics)
For more tutorials and a step-by-step pdf of this pattern construction, please subscribe over at patreon.com/mathemartiste
Apologies for my typo around the 13 minute mark. I typed poly4 instead of poly2 and threw an error because poly4 doesn't exist in my construction.
For the multiple outlined version in the video preview, I brought the pattern into Adobe Illustrator for additional work.
Thanks for watching and comment if you give this a go!
