Object Method Clarification Needed

gistfile1.txt

// From "Constructors with Methods" > 24/33 > Objects I > CodeAcademy.com

// QUESTIONS:
// 1. In line 19, why does the [rex] property, which is assigned to the [area] object, get a [calcArea] value? Or is it called a [calcArea] method of the [rex] property?


function Rectangle(height, width) {
  this.height = height;
  this.width = width;
  this.calcArea = function() {
      return this.height * this.width;
  };
  // put our perimeter function here!
  this.calcPerimeter = function() {
      return this.height * 2 + this.width * 2;
  };
}

var rex = new Rectangle(7,3);
var area = rex.calcArea();
var perimeter = rex.calcPerimeter();