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俄罗斯方块（第二版）
Author:
孟宝兴
GeoGebra
New Resources
Nested spiral octagon
長方體平面投影 (Codex版)
直角坐標平面上的旋轉變換
國旗 (作圖步驟直接餵給 Claude)
美國國旗 (Codex 版)
Discover Resources
垂足三角形
Equal chords and their distances from the centre
邊長與三角形 數學教室(1/4)
GGB2
【2020高考】新高考全国1卷（山东卷） 第16题
Discover Topics
Incircle or Inscribed Circle
Limits
Orthocenter
Cuboid
Perimeter