Contents Measuring and Analyzing » Inspect » Mass Properties Tool » Measuring the Properties of a Planar SectionPrint pageMeasuring the Properties of a Planar Section Click Measure > Inspect > Mass Properties. Click the Select Planar Face or Section Loop tool guide and select a planar area. Note: Mass properties for planar sections are approximated using edge tessellation. « Measuring the Projected Area of an Object or ObjectsSelecting a Coordinate System »