hw1

function Point(x,y){
	this.x = x;
	this.y = y;
	this.getDistance = function(point){
		var XDistance = this.x - point.x;
		var YDistance = this.y - point.y;
		return Math.sqrt(Math.pow(XDistance,2)+Math.pow(YDistance,2));
	}
}

n Triangle(p1,p2,p3){
	this.p1 = p1;
		this.p2 = p2;
			this.p3 = p3;
				var d12 = p1.getDistance(p2);
					var d13 = p1.getDistance(p3);
						var d23 = p2.getDistance(p3);
								
									this.getPerimeter = function(){
											var perimeter = d12+d23+d13;
													return perimeter;
														}
															this.getArea = function() {
																	var semiperimeter = this.getPerimeter()/2;
																			return Math.sqrt(semiperimeter*(semiperimeter - d12)*(semiperimeter - d23)*(semiperimeter - d13));
																				}
																				}