/** SVG/canvas path for a filled pie or donut sector. */
export declare function arcSectorPath(cx: number, cy: number, outerR: number, startAngle: number, endAngle: number, innerR?: number, counterClockwise?: boolean): string;
/** Trace a pie or donut sector on a Canvas 2D context (local coords; center at cx,cy). */
export declare function traceArcSector(ctx: CanvasRenderingContext2D, cx: number, cy: number, outerR: number, startAngle: number, endAngle: number, innerR?: number, counterClockwise?: boolean): void;