Answer:
Since there are five sides to the United States Pentagon, each side will be 1/5 of a mile. 1/5 of a mile is equal to 1056 feet or 352 yards. I did some reaserch and it is 77 ft (23 m) in height, and each of the five sides is 921 ft (281 m) in length, but look at the question the answer would be 1056 feet.
Explanation:
Hope it helps! =D