Mathematics, 20.12.2019 07:31 Geo777

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1: which choice can be used to confirm that a quadrilateral is a parallelogram?
a. a quadrilateral is a parallelogram if it has exactly one pair of congruent angles.
b. a quadrilateral is a parallelogram if it has exactly one pair of congruent sides.
c. a quadrilateral is a parallelogram if it has one pair of sides that are both congruent and parallel. d. a quadrilateral is a parallelogram if it has two angles that are supplementary.

2: which choice can be used to confirm that a quadrilateral is a parallelogram?
a. a quadrilateral is a parallelogram if it has two angles that are supplementary.
b. a quadrilateral is a parallelogram if its opposite angles are congruent.
c. a quadrilateral is a parallelogram if it has two angles that are complementary.
d. a quadrilateral is a parallelogram if it has exactly one pair of congruent sides.

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