function RectangleArea2D([arg1,arg2,arg3,arg4]) {
    let x1 = Number(arg1);
    let y1 = Number(arg2);
    let x2 = Number(arg3);
    let y2 = Number(arg4);
    let width = Math.abs(x1-x2);
    let height = Math.abs(y1-y2);
    let area = width*height;
    let perimeter = (width+height)*2;
    console.log(area);
    console.log(perimeter);
}