Creo Options Modeler > References > Fundamentals > Creo Parametric User Interface > The Analysis Tab > Measuring Geometry > Measuring Entities > Using Specific Measurement Types > Area > About Measuring Area
  
About Measuring Area
You can measure the area of a surface, quilt, facet, or model. If you select two or more reference entities of a type for which area can be measured, the total area for all the entities is reported. The selected entities do not have to be connected, and they do not have to be the same entity type.