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くの字の角の秘密
Author:
福永義行
GeoGebra
New Resources
standingwave
正１７角形 作図 regular 17-gon
対数螺旋
standingwave-plus
小テスト
Discover Resources
四角形のしきつめ
レムニスケート曲線（lemuniscate）
折り紙テント(内部皺入り)
Earthquake Simulator
教科書の作図(練習30(1))
Discover Topics
Conditional Probability
Similar Triangles
Kite
Hypothesis Testing
Calculus