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Apollonius Problem 4 LLP Homo 12
Author:
tkyggb
GeoGebra
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四邉形 (四年級) 教師版
画直线等分三角形的面积
兩組對邊相等和有直角的四邊形
找出對稱軸
拼砌四邊形
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根據百分率找數量（二）: 例2
test
陳允杰 橢圓反射
gjc090a23 鈍角三角形外心
學習活動三聯立不等式的圖形
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Multiplication
Equilateral Triangles
Plane Figures or Shapes
Arithmetic Mean
Numbers