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小5_三角形の角の大きさのひみつ
Author:
KUMIKO TAKANO
GeoGebra
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コイン投げと樹形図
sine-wave
正17角形 作図 regular 17-gon 2
standingwave
フーリエ級数展開
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三角形の外心
体5_116_ex
無理式を含む方程式の解
対角線が直交
コロコロ円
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Kite
Logic
Congruence
Area
Quadratic Functions