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動國旗
Author:
張丰耘
GeoGebra
New Resources
四邉形 (四年級) 教師版
算柱 (兩位數)
球体的体积推导（优化版）
兩位數除以一位數（一）
錐體建築師
Discover Resources
圓周 (圖形C)
Question 8
向量的座標變換矩陣與線性組合
cicle
heart
Discover Topics
Volume
Ellipse
Distributions
Scalene Triangles
Bar Chart or Bar Graph