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費馬點
Author:
Nickie Chen
GeoGebra
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第八周作业1
第三周作业效果演示
异形操场
龙形曲线-分形龙2
双心四边形
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教學－與直線有關的角
Ｍy GGC-1
交換律
Copy of 20151104 四邊形 P2
四邊形ADFE的面積是多少？
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Trapezoid
Plane Figures or Shapes
Incircle or Inscribed Circle
Diagrams
Surface