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Wikipedia
EN
In classical geometry, the radius of a circle or sphere is the length of a line segment from its center to its perimeter.
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Wikipedia
EN
Radius of gyration or gyradius refers to distribution of the components of an object around an axis.
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断
ダン
severance, decline, refuse
面
メン
mask, face, features
回
カイ
-times, round, game
転
テン
revolve, turn around, change
半
ハン
half, middle, odd number
径
ケイ
diameter, path, method
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