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Equation of the tangent to 2 circles touching externally
Author:
jleung
GeoGebra
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百分數及其應用
第八周作业2
科赫雪花
比較五件物件的重量
科氏力 (Coriolis Force)
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角平分線分點比例
畢氏定理3
正方形所夾三角形面積相等
Ex5C#12
七巧板（tangram）的副本
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Tangent Line or Tangent
Ellipse
Multiplication
Coordinates
Rotation