Consequently, the 2D rectangular lattice is constructed such ... the authors report a design principle allowing polymers to be arranged into 2D homeotropic orientations by using long-range dipole ...

3D shapes are not flat like 2D shapes. They have height, length and width. 3D shapes can have surfaces which are flat or curved. ... The faces of the cuboid are all rectangular in shape.

Learn how to work out the perimeter of a 2D shape with this Year 4 article from BBC Bitesize. BBC Homepage. Skip to content; ... A rectangle has two long sides and two short sides.