Working with polygon

Source code:
		
fire.require(
	function(){
		var output = $("#output > pre > code");
		
		output.append("Creating polygon square...<br/>");
		var pm = new fire.gear.geom.PrecisionModel(fire.gear.geom.PrecisionModel.FLOATING);
		var factory = new fire.gear.geom.GeometryFactory(pm);
		var c1  = new fire.gear.geom.Coordinate(8, 43);
		var c2  = new fire.gear.geom.Coordinate(8, 44);
		var c3  = new fire.gear.geom.Coordinate(9, 44);
		var c4  = new fire.gear.geom.Coordinate(9, 43);
		var shell = factory.createLinearRing([c1,c2,c3,c4,c1]);
		var holes = null;
		var pg = factory.createPolygon(shell, holes);
		
		output.append("Area: " + pg.getArea() + "<br/>");
		output.append("Length: " + pg.getLength() + "<br/>");
		
		var coords = pg.getExteriorRing().getCoordinates();
		output.append("Exterior: " + coords + "<br/>");
		
		var pt1  = factory.createPoint(new fire.gear.geom.Coordinate(7, 42));
		var pt2  = factory.createPoint(new fire.gear.geom.Coordinate(8.5, 43.5));
		output.append("Distance to " + pt1.toString() +  " is " + pg.distance(pt1) + "<br/>");
		output.append("Distance to " + pt2.toString() +  " is " + pg.distance(pt2) + "<br/>");
		
		output.append("intersects " + pt1.toString() +  ": " + pg.intersects(pt1) + "<br/>");
		output.append("intersects " + pt2.toString() +  ": " + pg.intersects(pt2) + "<br/>");
		
		var buffer = pg.buffer(0.5);
		output.append("Buffer: " + buffer.toString() + "<br/>");
		output.append("Buffer area: " + buffer.getArea() + "<br/>");
				
	} , {
		 modules : [fire.Modules.GEAR]
		,mode : fire.Mode.BUILD
		,otherScripts: []
		,relative: "../lib/fire/"
	}	
	
);