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Geometric Meaning of Derivatives
Author:
赵清河
GeoGebra
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找出對稱軸
錐體建築師
球體建築師
【案例】2018年全国1卷理科12题
近似值:有效數字
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畫三角形 題1b
三角形移動多一格
外面有圓
congruent triangles
Copy of 劉徽的「割圓術」