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Author:
chen mingchuan
GeoGebra
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兩位數加法
畫出對稱圖形
判斷球體
兩組對邊相等和有直角的四邊形
四邉形 (四年級) 教師版
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不規則區域著色
test
我的第一個GGB動畫
優良作品3(祥恩)
展開圓面積 (講義版)的副本
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Equilateral Triangles
Linear Programming or Linear Optimization
Definite Integral
Trapezoid
Quadratic Equations