diff --git a/Shared/Geometry.cs b/Shared/Geometry.cs
index c159135..98ff0fb 100644
--- a/Shared/Geometry.cs
+++ b/Shared/Geometry.cs
@@ -29,12 +29,12 @@ namespace SemiColinGames {
       return degToRad[degrees];
     }
 
-    public static float Sin(double degrees) {
-      return (float) Math.Sin(degrees);
+    public static float Sin(double radians) {
+      return (float) Math.Sin(radians);
     }
 
-    public static float Cos(double degrees) {
-      return (float) Math.Cos(degrees);
+    public static float Cos(double radians) {
+      return (float) Math.Cos(radians);
     }
 
     public static T Clamp<T>(T value, T min, T max) where T : IComparable {