Hatch is an integral part of our drawing, without hatch pattern our drawing is somewhat dull in presentation. And without hatch our drawing will hardly be understood by the readers. Well of course if you are a Draftsman or an Architect, you should already know the importance of hatch in a drawing. After all, it is instilled in drawing standard which we studied when we still in college, studying Architecture or Drafting I supposed.

Regions are two-dimensional enclosed areas that have physical properties such as centroids or centers of mass. Two or more existing regions can be combine into a single, complex region to calculate an area.