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2018东莞中考10改
Author:
yiyi
GeoGebra
New Resources
斐波那契螺旋弧线（表格法）
正方形雪花图案
撒针估算面积实验
平行線的判定
第八周作业
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Cross sections of cube
滑桿動態指令(動畫根本指令-用sequence)
圓周率的應用 題4
淘宝网
解三角形（１）
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Rectangle
Parabola
Parametric Curves
Symmetry
Pythagoras or Pythagorean Theorem