表面积(A) = πR^2 + πRl ( R:半径,l:三角形的高)
l = (A-πR^2)/πR
also
l^2 = R^2 + h^2 ( h:锥形的高)
[(A-πR^2)/πR]^2 = R^2 + h^2 (1)
由(1),可解出R
体积 =(1/3)(πR^2)h
表面积(A) = πR^2 + πRl ( R:半径,l:三角形的高)
l = (A-πR^2)/πR
also
l^2 = R^2 + h^2 ( h:锥形的高)
[(A-πR^2)/πR]^2 = R^2 + h^2 (1)
由(1),可解出R
体积 =(1/3)(πR^2)h