写出下列命题的逆命题,并判断其逆命题的真假;
(1)两直线平行,同旁内角互补
逆命题:______________________________________;( )
(2)正多边形的个内角都相等
逆命题:______________________________________;( )
(3)如果ab=0,那么a=0,b=0
逆命题:______________________________________;( )