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圓內的光反射
Author:
王政凱
GeoGebra
New Resources
龙形曲线-分形龙2
撒针估算面积实验
盈利與虧蝕
双心四边形
斐波那契螺旋弧线（表格法-可动态调节）
Discover Resources
trapezium
下和
重心三等分三角形
錐體的橫截面
Copy of 正方體的反射對稱1
Discover Topics
Linear Equations
Similar Triangles
Limits
Rotation
Integers