It's folded from an isosceles straight triangle. I made it in 2015. Did this model exist before that?
https://lh3.googleusercontent.com/1xkRV8SFeP6_NtgewAtxoaLeEGEBjeH_quSH4AELxOfhYVJEj5eFiKuZwWQ5BmEFmyi59eOBgiWFcXSDKuqpiPSUcgktaz70ePybubUKa13fAl7LWtOA6RwBTpcXwfffpd-Cn2oBIQ=w640 Thank you in advance. PS: Thank you David for the information about the hyperbolic paraboloids. Also, can I expect the picture I asked you the favor of sharing with me? Please let me know. -- Gerardo gerardo(a)neorigami.com
