A small, rectangular park has a perimeter of 560 feet and a diagonal measurement of 200 feet. What is its area, in square feet? A) 19200 B) 19600 C) 20000 D) 20400 E) 20800. Let L and W equal the length and width of the rectangle respectively. perimeter = 560 So, L + L + W + W = 560 Simplify: 2L + ...