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正三角形的旋轉
Author:
李春培
正三角形的旋轉
GeoGebra
New Resources
球體建築師
四邊形的特性
画直线等分三角形的面积
錐體建築師
算柱 (兩位數)
Discover Resources
堆朵3邊形(試算表版)
圆柱截方
立方体最短路经
一道三视图的题目（三视图作法参考）
operation of matrix
Discover Topics
Numbers
Parabola
Special Points
Solids or 3D Shapes
Curve Sketching