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内角と外角の関係
Author:
高濱良匡
GeoGebra
New Resources
接点の作る円は内接円
目で見る立方体の2等分
standingwave-reflection-free
正１７角形 作図 regular 17-gon
sine-wave
Discover Resources
ｙ’＝１／ｘ
すててもおｋ
三次関数
cosのとり得る値の範囲
一次関数（動点と三角形の面積） のコピー
Discover Topics
Perimeter
LCM and GCD
Natural Numbers
Probability
Solids or 3D Shapes