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三角形と比の証明２
Author:
Tsuyoshi Yamamoto
GeoGebra
New Resources
円の伸開線
コイン投げと樹形図
standingwave
直線の軌跡
接点の作る円は内接円
Discover Resources
reach_10_10
カオスとフラクタル
群論（阿弥陀くじの数学）
体5_257
作図の面白さ
Discover Topics
Curve Sketching
Equations
Secant Line or Secant
Differential Calculus
Calculus