How to use Intersection Curve in SolidWorks. 

SolidWorks Tips & Tricks.
How to use "Intersection Curve" in SolidWorks.
Intersection Curve tool in Solidworks sometimes can be very useful tool to obtain intersections between 3D or 2D geometries.
Intersection Curve opens a sketch and creates a sketched curve at the following kinds of intersections:
-A plane and a surface or a model face.
-Two surfaces.
-A surface and a model face.
-A plane and the entire part.
-A surface and the entire part.
You can use the resulting sketched intersection curve in the same way that you use any sketched curve, including the following tasks:
-Measure thickness at various cross sections of a part.
-Create sweep paths that represent the intersection of a plane and the part.
-Make sections out of imported solids to create parametric parts.
To use the sketched curve to extrude a feature, the sketch that opens must be a 2D sketch. Other tasks can be performed using a 3D sketch.
-To open a 2D sketch, select the plane first then click Intersection Curve.
-To open a 3D sketch, click Intersection Curve first then select the plane.
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