Add final if condition for checking invalid angle

Author: russom

implement-and-rewrite-tests/implement/1-get-angle-type.js

@@ -24,6 +24,12 @@ export function getAngleType(angle) {
     return "Right angle";
   } else if (angle > 90 && angle < 180) {
     return "Obtuse angle";
+  } else if (angle === 180) {
+    return "Straight angle";
+  } else if (angle > 180 && angle < 360) {
+    return "Reflex angle";
+  } else {
+    return "Invalid angle"
   }
 
 }