2D shapes are flat, plane shapes ... a protractor and a compass. Properties of 3D objects 3D objects have three dimensions - length, width and depth. Prisms are 3D objects with a constant cross ...

2D shapes include circle, triangle, square, rectangle. pentagon, hexagon.

Mathematicians’ Favorite Shapes Hold the Key to Big Mathematical Mysteries ...

Conventional 2D semiconductor-based sensors face challenges ... enabling the recording and reconstruction of 3D object shapes ...