# 1D #2D. #3D figures and difference among 1D ,2D and 3D #when 2D becomes 3 D

Difference among 1D ,2D ,3D 1D _ string 2D _ Square 3D _ cube. are egs. 4D ,5D ----- Etc objects are much more complicated than 3D objects area and volume introduction #2D objects have only area . it involves 2 axis x and y. It has no depth so no volume . you can not fill any thing in it . eg. carpet #3D objects have area as well as volume . it involves three axis x,y,z. It has depth . you can fill something in it eg. storage cabinet.