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Congruent (SSS) 5
Author:
Ricky Chan
GeoGebra
New Resources
球體建築師
画直线等分三角形的面积
判斷球體
四邉形 (四年級) 教師版
球体的体积推导（优化版）
Discover Resources
四則運算
西姆松定理推廣(西姆松圓)
数学
五年級_立體圖形_角柱展開圖
活动三：应用性质
Discover Topics
Vectors 3D (Three-Dimensional)
Ratios
Orthocenter
Triangles
Median Value