(n/2)^2 + (n/2)^2 = 16 (simplify and get (n))
(¹/₂n)² + (¹/₂n)² = 16 ¹/₄n² + ¹/₄n² = 16 ¹/₂n² = 16 2(¹/₂n²) = 2(16) n² = 32 √n² = √32 n = ±4√2