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関孝和
Author:
Shinta Sugawara
GeoGebra
New Resources
正１７角形 作図 regular 17-gon
standingwave-reflection-free
standingwave
サイクロイド
二次曲線と離心率
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GeoGebra Materials
反転円の性質
Ｃ曲線
ねじれの位置
合同な図形２
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Constructions
Surface
Rational Numbers
Median Line
Secant Line or Secant