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蝴蝶定理推廣證明2(交比)
Author:
連琨銘
GeoGebra
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畫出對稱圖形
錐體建築師
三位數除以一位數(一)
異分母分數減法
球体的体积推导
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正三角形的旋轉2
三角形的四心-五線-內外二圓
勾股定理的证明
分数应用题——巧分烧饼
对称拼图游戏
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Prism
Mode
Symmetry
Arithmetic Operations
Polygons