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2020東大理系５
Author:
Saito Koichi
GeoGebra
New Resources
サイクロイド
正１７角形 作図 regular 17-gon
二次曲線と離心率
接点の作る円は内接円
sine-wave
Discover Resources
双曲線の回転移動（数研4STEPⅢp23例題8）
x=cos3t,y=sin4t
合同条件
魔方陣４×４作り方
多角形の外角
Discover Topics
Tangent Line or Tangent
Matrices
Statistics
Arithmetic Operations
Vectors 3D (Three-Dimensional)