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dabuhe
Author:
xz26zx
daxiaohe
GeoGebra
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四邊形的特性
錐體建築師
畫出對稱圖形
sanjiaohanshu
【案例】2018年全国1卷理科12题
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相似圖形基本概念
三角形外心-性質說明
點之極線定理 / polar of a point theorem
凸透镜原理模拟
点、线、角
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Variance
Probability
Rhombus
Sphere
Orthocenter