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構成三角形的邊長條件
Author:
周桂名
移動C D，觀察一下是否能構成三角形？ 想一想：構成三角形的條件！
GeoGebra
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画直线等分三角形的面积
三位數除以一位數（二）
球體建築師
判斷球體
找出對稱軸
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極線獨立定理 / polar independence theorem
Section Curves
for 學姊
Math
正方体展开图的副本
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Tree Diagrams
Hypothesis Testing
Bar Chart or Bar Graph
Curve Sketching
Fractal Geometry