Chapter 6.4

Question 1

Theorem 6.8

Answer 1

If both pairs of opposite angles of a quadrilateral are congruent, then the quadrilateral is a parallelogram

Question 2

Theorem 6.9

Answer 2

If an angle of a quadrilateral is supplementary to both consecutive angles, then the quadrilateral is a parallelogram

Question 3

Theorem 6.10

Answer 3

If the diagonals of a quadrilateral bisect each other, then the quadrilateral is a parallelogram

Question 4

Theorem 6.11

Answer 4

If one pair of opposite sides of a quadrilateral are congruent and parallel, then the quadrilateral is a parallelogram

Question 5

Theorem 6.7

Answer 5

If both pairs of opposite sides of a quadrilateral are congruent, then the quadrilateral is a parallelogram