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円の面積はなぜ半径を2回かけるのか？ver4
Author:
T.Fujimaki
GeoGebra
New Resources
コイン投げと樹形図
standingwave
正１７角形 作図 regular 17-gon
standingwave-reflection-fixed
standingwave-reflection-free
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根号を含む計算
３次曲線の分類 その２
判断推理 演習問題１
単位円と三角比・三角関数
関数(比例)
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Conic Sections
Angles
Arithmetic
Confidence Interval
Probability