I'm using ArcGIS 10 to build some figures for a journal article. One is a figure of an unstructured finite element mesh of triangles spanning the western Atlantic Ocean. I exported this mesh from SMS to a polygon shapefile where each triangle is a polygon and added it to my ArcGIS map. It looks great; however, the islands (such as Haiti and Cuba) are also polygons in the shapefile. I would like to remove them without manually selecting them all.
Is there a way I can select only the polygons with more than 3 sides in order to delete them?