diff --git a/lib/utils/math.js b/lib/utils/math.js
index e4f3572..32e2eb2 100644
--- a/lib/utils/math.js
+++ b/lib/utils/math.js
@@ -2,7 +2,7 @@ define(function () {
   var self = {};
 
   self.distance = function distance(a, b) {
-    return Math.pow(a.x - b.x, 2) + Math.pow(a.y - b.y, 2);
+    return (a.x - b.x) * (a.x - b.x) + (a.y - b.y) * (a.y - b.y);
   };
 
   self.distancePoint = function distancePoint(a, b) {