ArcGIS Pro 3.4 API Reference Guide
ArcGIS.Core.Data.Analyst3D Namespace / TinTriangle Class / Length3D Property
Version

Length3D Property (TinTriangle)
Gets the 3D length (i.e. perimeter) of this TIN triangle. The length is in the units of the spatial reference of the TIN. See TinDatasetDefinition.GetSpatialReference. This method must be called on the MCT. Use QueuedTask.Run.
Syntax
public double Length3D {get;}
Requirements

Target Platforms: Windows 11, Windows 10

ArcGIS Pro version: 3.2 or higher.
See Also