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傍心と内心
Author:
Bunryu Kamimura
△ABCの9点円を作図してみよう。3辺の中点を通る円が9点円。すると・・・
GeoGebra
New Resources
standingwave-plus
standingwave-reflection-fixed
二次曲線と離心率
standingwave-reflection-free
接点の作る円は内接円
Discover Resources
等距離共役点ジェルゴンヌとナーゲル
図形パズル
逆中点三角形の作図(平行)
垂足円と足円
割合と百分率
Discover Topics
Orthocenter
Tree Diagrams
Rational Numbers
Quadratic Functions
Upper and Lower Sum or Riemann Sum