API Reference > geometry-core > Curve > Arc3d > curveLengthBetweenFractions curveLengthBetweenFractions Method If this is a circular arc, return the simple length derived from radius and sweep. Otherwise (i.e. if this elliptical) fall through CurvePrimitive integrator. curveLengthBetweenFractions(fraction0: number, fraction1: number): number Parameter Type Description fraction0 number fraction1 number Returns - number Defined in curve/Arc3d.ts Line 427 Last Updated: 12 June, 2024