Respuesta :

4.54 m²

the shaded area = area of square - area of circle = s² - πr²

square has side = 2 × 2.3 = 4.6

shaded area = 4.6² - π × 2.3²

                     = 21.16 - 16.619.. = 4.54 m² ( to 2 dec. places )