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重心 內心 外心 垂心
Author:
26黃國修
GeoGebra
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【案例】2013年安徽高考15题
兩組對邊相等和有直角的四邊形
第八周作业
球體建築師
畫出對稱圖形
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B3_1-5_互動例6
gyzel 橢圓的反射
v中點座標軌跡(圓大正多邊形小)
極值問題
折叠问题一例
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Incircle or Inscribed Circle
Sphere
Trapezoid
Kite
Integral Calculus