苏教版六年级数学第二单元圆柱和圆锥所用到的公式都哪些 苏教版小学六年级数学(下)第二单元圆柱和圆锥,得数是多位数时...
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圆柱体积:V=底面积×高或V=1/2侧面积×高圆锥体积:V=底面积×高÷3
圆柱侧面积:S侧=底面周长×高
圆柱表面积:S表=侧面积+2个底面积
圆锥面积公式:
S侧=πrl=(nπl^2)/360(r:底面半径,l:圆锥母线,n:圆心角度数)
底面周长(C)=2πr=(nπl)/180(r:底面半径,n:圆心角度数,l:母线长)
h=根号(l^2-r^2)(l:母线长,r:底面半径)
全面积(S)=S侧+S底
V=1/3Sh=1/3πr^2h(S:底面积,r:底面半径,h:高)
V(圆锥)=1/3·V(圆柱)=1/3·Sh =1/3·πr^2h(S:底面积,r:底面半径,h:高)
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