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1: To show that a quadrilateral is a parallelogram, show that the ______ bisect each other

A. angles
B. diagonals
C. congruent
D. supplementary
E. triangle

2: To show that a quadrilateral is a parallelogram, show that both pairs of opposite sides are ______. *

A. angles
B. diagonals
C. congruent
D. supplementary
E. triangle

3: To show that a quadrilateral is a parallelogram, show that one angle is ______ to both of its consecutive angles. *

A. angles
B. diagonals
C. congruent
D. supplementary
E. triangle

4: To show that a quadrilateral is a parallelogram, show that each diagonal divides the parallelogram into two congruent ______. *

A. angles
B. diagonals
C. congruent
D. supplementary
E. triangle

5: To show that a quadrilateral is a parallelogram, show that both pairs of opposite ______ are congruent.

A. angles
B. diagonals
C. congruent
D. supplementary
E. triangle​