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西姆森线的性质定理——定理3
Author:
Sylvie
GeoGebra
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畫出對稱圖形
柱體建築師
兩組對邊相等和有直角的四邊形
錐體建築師
【案例】圆柱体内放置一个大球六个小球
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例題11
圓柱的截面
有向角
線的面化
三角形全等的理由 – 題1的副本
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Reflection
Random Experiments
Inequalities
Matrices
Real Numbers