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任務1的副本
Author:
陈宇
,
gklwong
GeoGebra
New Resources
找出對稱軸
美國國旗 (Codex 版)
sanjiaohanshu
拼砌四邊形
第八周作业
Discover Resources
方格紙上畫梯形2
七巧板（tangram）
task 8
設計對稱圖形
過點切圓的動圓圓心軌跡
椭圆内部全等的双椭圆构造.许兴华数学
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Numbers
Distributions
Parametric Curves
Dilation
Probability