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词汇
球扇形
释义
球扇形
qiú shàn xíng
又稱“球分”、“球心角體”。一個扇形繞着一條不通過它的內部的直徑旋轉一週所得的幾何體。扇形的弧旋轉所形成的球冠或球帶稱爲球扇形的底,這個球冠或球帶的高稱爲球扇形的高。設球扇形的高爲h,球半徑爲r,則球扇形的體積爲v=23πr2h。
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更新时间:2025/4/9 15:59:24