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拋物線1-焦點法
Author:
22吳心妤
GeoGebra
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四邉形 (四年級) 教師版
判斷球體
球體建築師
畫出對稱圖形
錐體建築師
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蝴蝶定理證明1：Steven構造恒等式
BkD_act15_02c
Question 3
全排列
正圆锥展开图
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Tree Diagrams
Similar Triangles
Derivative
Natural Numbers
Difference and Slope