Hellow guys, Welcome to my website, and you are watching #VisualMath: A Quick Way to Build a 3 Dimensional Pyramid 1-abs(x+y)-abs(y-x) #graphing #mathart. and this vIdeo is uploaded by Mathematics Proofs - GCSE & A Level at 2024-02-23T04:59:31-08:00. We are pramote this video only for entertainment and educational perpose only. So, I hop you like our website.