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圆扇形展开（解释面积公式）
Author:
朱亮
GeoGebra
New Resources
判斷球體
Fibonacci Clock
四邊形的特性
Earth with coastline
國旗 (作圖步驟直接餵給 Claude)
Discover Resources
三節棍
Pyramid (Angle between Plane HBC and HCD)
三節棍
完全图及其变形
活动三：应用性质
Discover Topics
Similar Triangles
Confidence Interval
Tangent Function
Vectors 3D (Three-Dimensional)
Geometric Mean