s3
摺紙片段
1. 摺出正四面體方法
https://www.youtube.com/watch?v=cgEVikCbSII&list=WL&index=71
2. 摺正八面體
https://www.youtube.com/watch?v=xJmzIzOhMo0&list=WL&index=70
3. 摺正十二面體
https://www.youtube.com/watch?v=mPrpl1zCreY&list=WL&index=69