Which statements prove that a quadrilateral is a parallelogram? select each correct answer.   quadrilateral defg has opposite angles that are congruent.  quadrilateral defg has diagonals that bisect each other.  quadrilateral defg has only one set of opposite sides that are congruent.   quadrilateral defg has only one set of consecutive angles that are supplementary.'

What is the length of the missing leg in this right triangle? 18 mm 24 mm 26 mm 32 mm

Solve x+3y=6 and 4x-6y=6 by elimination . show work !

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