The square has a perimeter of 24 ft. What is the length of each side. Pl help

Which of the following system of equation is not equal to the system of equations is not equal to the system of equations shown below

    choose the correct definition for  extremo.  a.  end      b.  extra      c.  extract      d.  eventual 

Given: lines a and b are parallel and line c is a transversal. prove: 2 is supplementary to 8 what is the missing reason in the proof? statement reason 1. a || b, is a transv 1. given 2. ∠6 ≅ ∠2 2. ? 3. m∠6 = m∠2 3. def. of congruent 4. ∠6 is supp. to ∠8 4. def. of linear pair 5. ∠2 is supp. to ∠8 5. congruent supplements theorem corresponding angles theorem alternate interior angles theorem vertical angles theorem alternate exterior angles theorem