
David W. answered 03/01/16
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Note that 10 miles South and then 10 miles West usually creates a triangle with the hypotenuse "going back to the camp" that is (10)(1.414) miles [ or 10√2 miles).
How can the distance back to camp be just 10 miles? This only happens at the North Pole. That means that the campers saw a polar bear (if one is even therel) which appear white to tan but are actually transparent.