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円の面積（分割）
Author:
Tsuyoshi Yamamoto
GeoGebra
New Resources
standingwave-reflection-free
正１７角形 作図 regular 17-gon 2
standingwave-plus
コイン投げと樹形図
sine-wave
Discover Resources
双曲線の方程式
数Ⅲ 極限
三平方の定理
tetranball
絶対値を含む関数のグラフと移動
Discover Topics
Rotation
Line Segment
Subtraction
Geometric Distribution
Plane Figures or Shapes