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放物線の焦点
Author:
yoshiyuki ishitsuka
GeoGebra
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standingwave
正１７角形 作図 regular 17-gon
standingwave-reflection-free
standingwave-reflection
sine-wave
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複素積分 w=z^3
組み立て除法
数学Ⅲ回転体＆体積MT01
Copy of 三平方の定理（ピタゴラス）
円に内接する四角形の向かい合う角
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Random Experiments
Constructions
Sine
Area
Vectors