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円周角の定理
Author:
Tetsuya Akazawa
GeoGebra
New Resources
sine-wave
standingwave-plus
接点の作る円は内接円
小テスト
等積変形2
Discover Resources
点の存在範囲(2D別)
楕円の焦点の見つけ方
コンコイドによる角の3等分(2)
立方体の展開図
金星の見え方(年周運動)
Discover Topics
Geometric Transformations
Real Numbers
Geometric Mean
Optimization Problems
Line Segment