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虹が見えるのはなぜ？
Author:
yoshiyuki ishitsuka
GeoGebra
New Resources
standingwave-plus
アステロイド
standingwave
正１７角形 作図 regular 17-gon 2
standingwave-reflection-free
Discover Resources
ihoiwoi
三角形の辺の垂直二等分線（a circumcenter）
中一 反比例 点の動き（使用）p129
P168 立方体の切断
人間(未訂正)
Discover Topics
Geometric Distribution
Equations
Statistics
Circle
Means