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内凹的正方形
Author:
叶明杰
GeoGebra
New Resources
百分數及其應用
斐波那契螺旋弧线（表格法-可动态调节）
龙形曲线-分形龙2
盈利與虧蝕
第八周作业3
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平面向量
標準差：測驗
HKCEE-AM 2010 Q17 part a+b
Copie de Comparing fractions using number lines and rectangles
中一︰棱柱的總表面面積-長方體的副本
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Incircle or Inscribed Circle
Statistics
Reflection
Square
Addition