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仿射变换
Author:
Erye
GeoGebra
New Resources
直角坐標平面上的旋轉變換
算柱 (兩位數)
美國國旗 (Codex 版)
Fibonacci Clock
Nested spiral octagon
Discover Resources
parallelogram
平面切割正立方體
circle
分數約分
元旦快乐（制作：孟宝兴）
Discover Topics
Random Variables
General Quadrilateral
Conditional Probability
Conic Sections
Expected Value