API Reference > geometry-core > Curve > Arc3d > clonePartialCurve clonePartialCurve Method Return (if possible) an arc which is a portion of this curve. clonePartialCurve(fractionA: number, fractionB: number): undefined | CurvePrimitive Parameter Type Description fractionA number start fraction fractionB number end fraction Returns - undefined | CurvePrimitive Defined in curve/Arc3d.ts Line 884 Last Updated: 12 June, 2024