Hey guys, so I don't know what I did wrong here...

The goal was to create a method called perimeter that calculated the perimeter. It already gave me the radius as an example. The error message was:

Oops, try again. Your perimeter method fails on a Circle with radius 1 where it returns NaN when it should return 6.283185307179586

Can you guys help me with this? Thanks!

```
function Circle (radius) {
this.radius = radius;
this.area = function () {
return Math.PI * this.radius * this.radius;
}
};
// define a perimeter method here
function Circle (perimeter) {
this.perimeter = perimeter;
this.perimeter = function () {
return Math.PI * 2 * this.radius;
}
};
```