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三角形と比の証明
Author:
Tsuyoshi Yamamoto
GeoGebra
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対数螺旋
目で見る立方体の2等分
standingwave
standingwave-plus
等積変形2
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Ex_86
不連続の定義
アポロニウス円錐曲線論1
ミケル・スタイナー点
整数問題2.00
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Mode
Logic
Congruence
Continuity
Symmetry