JSFiddle - React, Tailwind, and code Playground

JavaScript

var beaconCoordinates = [[10,20], [200,300], [50,500]];

    //get values from array
    var aX = parseInt(beaconCoordinates[0][0]);
    var aY = parseInt(beaconCoordinates[0][1]);
    var bX = parseInt(beaconCoordinates[1][0]);
    var bY = parseInt(beaconCoordinates[1][1]);
    var cX = parseInt(beaconCoordinates[2][0]);
    var cY = parseInt(beaconCoordinates[2][1]);

    console.log(cY);