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任务9：外凸的正方形
Author:
陈丽婷
GeoGebra
New Resources
第八周作业3
比較五件物件的重量
科氏力 (Coriolis Force)
盈利與虧蝕
祖冲之的期望：内棋与外棋
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正方形的旋轉
方格紙上畫平行四邊形4
畢氏定理的圖形證明法
美麗的花
拋物線2--焦點法
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Parametric Curves
Multiplication
Tree Diagrams
Median Line
Straight Lines