Respuesta :
					                   Since a square has 4 equal sides, just do 19 + 19 + 19 + 19 which is 76. Or, 19 x 4, even though you add with permieter, it'll still work on a square. 
Hope I helped!
					                
					             Hope I helped!
					                   square has 4 equal sides and the peremeter is adding all the sides together and so 19 + 19 + 19 + 19 = 76