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餘弦定理
Author:
yuchengda
GeoGebra
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【案例】2018年全国1卷理科12题
球体的体积推导（优化版）
【案例】圆柱体内放置一个大球六个小球
第八周作业
畫出對稱圖形
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教學－旋轉
horizontal
二次函數中參數對圖形的影響
二次函數
拋物線6--包絡線法
Discover Topics
Dilation
Multiplication
Division
Combinatorics
Special Points