ArcGIS Pro 3.0 API Reference Guide
ArcGIS.Core.CIM Namespace / CIMGeometricEffectCircularSector Class / StartAngle Property

StartAngle Property (CIMGeometricEffectCircularSector)
Gets or sets the start angle of the circular sector. The angle is calculated in a counterclockwise manner with 0 degrees equal to due east.
Syntax
public double StartAngle {get; set;}
Requirements

Target Platforms: Windows 11, Windows 10, Windows 8.1

ArcGIS Pro version: 2.7 or higher.
See Also