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第4問外接円
Author:
河本順康
GeoGebra
New Resources
サイクロイド
等積変形2
standingwave-reflection
平均変化率
対数螺旋
Discover Resources
Poncelet's Porism
convex function example
２次方程式の利用（直角三角形上の動点）
Cone Command
螺旋円錐5P
Discover Topics
Pie Chart or Circle Chart
Triangles
Exponent
Logarithm
Set Theory