angularjs unable to find templates directory, flask as backend

I am using flask as backend and angularjs on client-side

my directory structure:

dew:

  ->app.py

  ->templates
    ->hello.html
    ->test.html

  ->static
    ->js
      ->directives.py
    ->lib
      ->angular.js

my app.py file:

from flask import Flask, make_response,render_template
@app.route("/aboutUs")
def aboutUs():
    return render_template("test.html", title="test page")

my directives.py file :

angular.module('components',[])
    .directive("helloWorld",function($scope,$log){
        $scope.$log = $log;
        return{
            restrict:"A",
            templateUrl:"templates/hello.html"
        }
    })

angular.module('testApp',['components'])

Flask was able to render the test.html template properly, but angular was showing hello.html, template not found error