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陳隆期
GeoGebra
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画直线等分三角形的面积
四邉形 (四年級) 教師版
兩位數除以一位數（一）
錐體建築師
第八周作业
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平方數平方數
GeoGebraBook(for20151202)
How to draw an octagon with ruler and compasses?
hjzx123456
勒洛三角形任意點P軌跡
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Solids or 3D Shapes
Addition
Tree Diagrams
Expected Value
Limits