diff --git a/Angle.h b/Angle.h
index edabf65..6f130ff 100644
--- a/Angle.h
+++ b/Angle.h
@@ -5,6 +5,8 @@
 #ifndef ANGLE_H
 #define ANGLE_H
 
+namespace Passer {
+
 template <typename T> class Angle2 {
 public:
   Angle2(){};
@@ -52,4 +54,7 @@ public:
   static float SineRuleAngle(float a, float beta, float c);
 };
 */
+} // namespace Passer
+using namespace Passer;
+
 #endif
\ No newline at end of file