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Circumference 圓周
Author:
Alex CHIK
GeoGebra
GeoGebra 互動數學教室
http://www.geogebra.hk
New Resources
小数 的副本
兩組對邊相等的四邊形
sanjiaohanshu
美國國旗 (Codex 版)
Fibonacci Clock
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Interest（利息）
齊找對稱軸
比較圖形大小2
earth
正方形推垛
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Algebra
Unit Circle
Terms
Power Functions
Complex Numbers