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旋转性质：旋转角
Author:
月如
GeoGebra
New Resources
四邉形 (四年級) 教師版
兩組對邊相等的四邊形
球體建築師
判斷球體
拼砌四邊形
Discover Resources
Geometry Exercises
複合棒形圖_並列
圓錐截面曲線
Copy of 劉徽的「割圓術」
学习 CAS 计算器
Discover Topics
Surface
Correlation
Scalene Triangles
Parallelogram
Solids or 3D Shapes