API Reference > imodeljs-common > Geometry > MassPropertiesOperation MassPropertiesOperation Enumeration Specify whether to accumulate volumes, areas, or lengths for the supplied elements. Members Name Value Description AccumulateLengths 0 Return lengths for open paths and planar regions. AccumulateAreas 1 Return areas and perimeters for solid and surface geometry. AccumulateVolumes 2 Return volumes and areas for solid geometry. Defined in core/common/src/MassProperties.ts Line 15 Last Updated: 29 November, 2022