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Frank burk
Author:
Shinta Sugawara
GeoGebra
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平均変化率
standingwave
コイン投げと樹形図
対数螺旋
standingwave-reflection
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変化
反比例ものさし
数学3 パラボラアンテナの原理
三角形の五心
y=ax^2+bの残像
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Reflection
Cone
Trapezoid
Solids or 3D Shapes
Median Line