Բ
ʲô - ٶȾ
1 ԲһԲռռĴСԲһԲȵȸߵԲ1/3Բv=1/3ԲԲĸ=1/3(sh)Բ=뾶뾶Բʦ=ТrrԲv=1/3(Тrrh)sΪԲĵrΪ뾶hΪԲĸߣԲʽV=ShV=r^2hóԲ...
Բô - ٶȾ
hΪԲĸߣS=RʽΪVԲ=1/3Rh=1/33.141.5511.77ף2λС...
ԲӦôƵ?
ȿµԲڽԲǽԲ߶һΪڽԲĸ(1/2)hڽԲĵ뾶(1/2)rڽԲ...
ԲȺߵĹϵʲô?Ǹߵη...
ʽǿԿԲǵ뾶ȵƽ߶ȱȵĻˣԲĸ߶Ȼ뾶һһĹϵ...
ԲеĹʽ
Բ:V=V=1/2Բ:V=ߡ3Բ:S=ܳԲ:S=+2 ĸʾ:Բ: V=shԲ...
ռ伸ʽ,,Բ̨...
2Բ: :r+r[(h+r)ƽ] :rh/3 (rΪԲԲ뾶,hΪ, 3 a-߳,s=6a ,v=a 4 a- ...
Բ֪ʶ
1. Բ 壺ԲָһԲռռĴС 㹫ʽԲڵԸߵ֮һߣԱΪԲȵȸߵԲ...
Բʽʲô?
ԲʽǣԲĵ=ԲСrr (d2(d2)Բֻһ棩ԲV=sh3Sǵ...
ʽ1/3ô?
ͼʾԲĵ뾶Ϊr, Ϊh, \piʾԲʣȻԲΪ\pi r^2h. DzԲȻ͵...
Ĺʽʲô?
Բ=sסh3 ̨ʽ:v=[ s+(ss)+s]h3 Բ̨ʽ:v=(r+rr+r)hС3 ȱʽ=h(3r-h)3 ʽ:v=4r/3 ʽ:v=sh=sֱl (lΪⳤ,hΪ) ̨:v=s1+s2+(s1*s2)/3*h ע:v: