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紹興師爺
2020-02-26 11:27:02
V柱=ЛH柱R柱^2V錐=(ЛH錐R錐^2)3V柱/V錐=3H柱R柱^2/(H錐R錐^2)第一題3*2h*(2d/2)*(2d/2)/[h*(d/2)*(d/2)]=24:1第二題直徑比1:3既是半徑比為1:33*h*r*r/(2h*3r*3r)=1:6
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2009-07-14
2017-12-26
2017-12-26
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2017-12-26
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