Answer:option DStep-by-step explanation:we have a right trianglewe knowc^2=a^2+b^2c=hypotenusec=52 cma=48 cmb= 20 cmwe substitute in the equation c^2=a^a+b^2 so we have52^2=48^2+20^252= sqrt(48^2+20^2)52= sqrt(2304+400)52= sqrt(2704)52cm=52cm so c=52 cmso the option D is the correct answer