We intersect regions through the Intersect command in Autocad and ZWCAD+. The Intersect command refers to create compound solids or regions from the intersecting part of two or more solids or regions and deletes outside parts of intersection,then we can Find area intersection between two 2D entities .
Ribbon: Solid » Boolean » Intersect
1) Command: intersect
Execute Intersect command
2) Select objects: click to select two circle regions
Select intersecting objects
3) Select objects: selected 1 objects, 2 objects in all
Display the number of the intersecting regions you select
4) Select objects: press Enter or the right mouse button
Finish selection of intersecting objects and intersection (e.g. picture 1)
Or you can continue to select more intersecting objects.
Picture 1: intersect objects through the Intersect command
Attention: the intersecting objects must share an intersecting part, if not, the selected objects will be deleted after executing the Intersect command.