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比和比值
Author:
李春培
比和比值
GeoGebra
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錐體建築師
畫出對稱圖形
算柱 (兩位數)
柱體建築師
兩組對邊相等的四邊形
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四點共圓練習題1
賴桑_等差數列與級數_兩數列之比例
Prism and Cylinder 1
箭头平移动画
例题2（P点可拖动）
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Similar Triangles
Cosine
Median Line
Constructions
Continuity