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黄金比
Author:
樽 正人
GeoGebra
New Resources
standingwave-reflection-free
standingwave-reflection-fixed
サイクロイド
standingwave
接点の作る円は内接円
Discover Resources
Fermat Point and Steiner Point（フェルマー点とシュタイナー点）
Math Investigation-1
整数問題1.11
放物線の極と極線
模試20-11-3
Discover Topics
Logarithm
Definite Integral
Line Segment
Curve Sketching
Orthocenter