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Author:
陳兪宏
艾董幾何題
GeoGebra
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異分母分數減法
球體建築師
畫出對稱圖形
錐體建築師
球体的体积推导(优化版)
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畫三角形 題1a
增長的圓
幾何問題_圓01
二元一次聯立方程式圖解
圓例4
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Dilation
Arithmetic Mean
Combinatorics
Correlation
Sequences and Series