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Author:
鄭宏偉
GeoGebra
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椭圆内切圆链
比較五件物件的重量
平行線的判定
双心四边形
GeoGebra数学资源(4-8年级)
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謝爾賓斯基三角形 (Sierpinsky)
優良作品2(孟倫)
Redefining Trigonometry by a Unit Circle
堆疊多邊形
圓周公式應用題2的副本
Discover Topics
Natural Numbers
Intersection
Similarity Transformation or Similarity
Scatter Plot
Random Variables