Equation Icon  V~ ---------( gf ) Area(S)- -1- ' ' ' I (S) := 16pG2 1 + 4p (2rr - ss - ss ) dS = V~ --------- gf S Area(S)--1- ( ) = 16pG2 4p - y2 - y2'+ 2f11 + 2/\ dS. S