What is the contrapositive of the following statement? if a polygon has five angles, then it has five sides. if a polygon has five sides, then it has five angles. if a polygon does not have five angles, then it does not have five sides. if a polygon does not have fives sides, then it does not have five angles.

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