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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
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sine-wave
standingwave-reflection-fixed
正１７角形 作図 regular 17-gon 2
standingwave-plus
standingwave-reflection
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慣性をもつ点A
test
ピックの定理 ドーナッツ型
２次関数の標準形
対数螺旋
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Frequency Distribution
Inequalities
Conic Sections
Division
Ellipse