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一組物件的幾分之幾（練習）
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GeoGebra
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画直线等分三角形的面积
找出對稱軸
球體建築師
兩組對邊相等的四邊形
兩位數加法
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吳老師幾何題
畫三角形 題1b
正五角柱展開
角平分線作圖1213
光的折射
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Similar Triangles
Differential Equation
Rhombus
Dilation
Rectangle