What are the coordinates of the image of vertex g after a reflection across the line y = x? (–4, –5) (4, 5) (–5, 4) (5, –4)

Find the perimeter of the triangle with vertices  d(3, 4),  e(8, 7), and  f(5, 9). do not round before calculating the perimeter. after calculating the perimeter, round your answer to the nearest tenth.