package cn.edu.bjut.chapter4_1;

public class Rectangle extends Shape {
	private double length, width; 
	
	public Rectangle(double length, double width) {
		this.length = length; 
		this.width = width; 
	}

	@Override
	public double area() {
		return (length * width);
	}

	@Override
	public double perimeter() {
		return (2 * (length + width));
	}

}