import type { ArrayVector2D } from "./types.js";
/**
 * Calculate the Euclidean distance between two 2D vectors.
 * @param {ArrayVector2D} xy1 - First vector as `[x, y]`
 * @param {ArrayVector2D} xy2 - Second vector as `[x, y]`
 * @returns {number} Euclidean distance
 */
export declare const distance2D: (xy1: ArrayVector2D, xy2: ArrayVector2D) => number;