Rocio poured a square patio outside her back door. Each side measured 8.5 feet. Which equation represents the perimeter, in feet, of Rocio's patio? A. 8.5 + 8.5 = 17 B. 4 × 8.5 = 34 C. 2 × 8.5 = 17 D. 8.5 × 8.5 = 72.25