3D Representation of Organic Molecules
A three-dimensional (3-D) structure of organic molecules can be represented on paper by using certain conventions. A solid () wedge is used to indicate a bond projecting out of the plane of the paper, towards the observer. A dashed () wedge is used to indicate a bond projecting out of the plane of the paper, away from the observer.
An example of a 3D representation of organic molecules
This example will help you understand better