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内分点（２：１）
Author:
kyouko
Topic:
Constructions
GeoGebra
New Resources
standingwave-reflection-free
二次曲線と離心率
接点の作る円は内接円
正１７角形 作図 regular 17-gon 2
等積変形2
Discover Resources
一次関数のグラフ（2点を通る）
Brief History of IGS/DGS
内分・外分
双曲放物面の曲率
dandelinelip
Discover Topics
Curve Sketching
Piecewise Functions
Boxplot
Rational Numbers
Numbers