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内心（図形の性質）
Author:
田中利則
GeoGebra
New Resources
standingwave-reflection
standingwave-reflection-fixed
対数螺旋
接点の作る円は内接円
standingwave
Discover Resources
折り紙テント２段階設計図
二等辺三角形を折り返す
ダブル屈折a
グラフ作成用
接点の作る円は内接円
Discover Topics
Vectors 3D (Three-Dimensional)
Arithmetic
Histogram
Planes
Cone