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菱形
Author:
eyun306
GeoGebra
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活动三:应用性质
撒针估算面积实验
盈利與虧蝕
第八周作业1
比較五件物件的重量
Discover Resources
畢氏定理
三角函數
分蛋糕
任何三角形內角和180度(五上數翰4-2)
分數1
Discover Topics
Cosine
Arithmetic Operations
Sine
Numbers
Incircle or Inscribed Circle