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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
找出對稱軸
拼砌四邊形
算柱 (兩位數)
錐體建築師
四邉形 (四年級) 教師版
Discover Resources
圖四
三棱锥的三视图
Copy of 方格紙上畫四邊形
百變糖果棒
推移（y 方向）的副本
Discover Topics
Natural Numbers
Real Numbers
Statistics
Angles
LCM and GCD