Series Content INTRO 歐拉 | Euler LESSON 1 正視圖/側視圖/俯視圖 | Front View, Side View and Top View LESSON 2 展開圖 | Net of 3-D Figures LESSON 3 立體的點、線及平面 | Points, Lines and Planes in 3-D Figures LESSON 4 歐拉公式 | Euler’s Formula ADD-ON 截角二十面體 | Truncated Icosahedron
