What color is the bear?

A hunter walks 1 mile south. He then turns left and walks 1 mile east, then turns left again and walks 1 mile north. He ends up back where he started and spots a bear. What color is the bear?

The answer is white, as he is at the north pole. What do you see in this question?
As the hunter walks 1 mile south , 1 mile east and 1 mile north, he has formed 2 right angles. But yet he was back at the same spot as he started. This means the triangle formed from the hunter's path contains 2 right angle.

Why is this possible?