The polygon ABCDEF has vertices A(1, - 3) , B(- 1, - 3), C(- 1, - 1) , D(- 4, - 1), E(- 4, 5) and F(1, 5) . Find the perimeter of the polygon , in units . PLEASE

This is a rational expression because the denominator contains a variable. this is a polynomial with 3 terms. this is a rational expression because the denominator contains a variable. this is a polynomial with 4 terms. this is a rational expression because the denominator contains a variable. this is a polynomial with 4 terms. this is a rational expression because the denominator contains a variable. this is a polynomial with 3 terms. this is a rational expression because the denominator contains a variable. this is a polynomial with 5 terms.