汉英词典
Chinese-English Dictionary
MEANING OF 弧度
弧度
radian / arc / curve / curvature
〈量〉平面角的单位,符号rad。圆心角所对的弧长和半径相等,这个角就是1弧度角,1弧度约等于57°17′44.8″。旧称弪(jìng)。
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