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三角形性質--大角對大邊、小角對小邊
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GeoGebra
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双心四边形
第八周作业
三角函数 的副本
活动三:应用性质
撒针估算面积实验
Discover Resources
三角形3,4,5
Möbius strip
CIRCLE
中間人
加法(10一數的副本
Discover Topics
General Quadrilateral
Vectors 2D (Two-Dimensional)
Equilateral Triangles
Parametric Curves
Pyramid