It means that a shape has Length, Width and Height
2D ( 2 dimensional) shapes only have Lenght and Hieght
to carry genetic material and maintain a 3 dementional shape
you don't. inches is a measure of length. cubic inches is a measure of volume. As told by by ID1245921910. To Confirm this, Inches by its self can be expressed as 2 Dementional where as Cubic Inces is more as a 3 Dementional expression.
Square feet is a 2-dementional state whereas gallon(s) are 3-dementional in quality. Impossible to answer question. barbrasydow@att.net
2 dementional
one dementional array and two dementional array
That depends on where the forces will be coming from. If both structures are subjected to forces in 3 dimensions, then the 3 dimensional structure will be less apt to fall over or something. If by strength you mean not compressing, then the 2 dimensional structure might be better theoretically, though you couldn't really build a 2 dimensional structure.
heptagon
Having depth, width and height.
surface area is the measure of a 3dementional and 2 dementional object
There are lots of 3 dimensional shapes, like spheres, cubes, rectangular prisms, triangular prisms, pyramids, tetrahedrons, the list could go on forever.
It's called a crystal lattice
no. take the small side of a piece of paper for example. there is still a very small width.