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三角形の傍心(excenters)
Author:
Takayuki Kamei
GeoGebra
New Resources
standingwave-reflection
正17角形 作図 regular 17-gon 2
円の伸開線
接点の作る円は内接円
standingwave-reflection-fixed
Discover Resources
ガモフの問題
補習3ー1
回転体4step465-y
P3_3D
小5_p42_□×△+○×△=(□+○)×△
Discover Topics
Arithmetic
Surface
Boxplot
Angles
Matrices