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.'

- Statement 1 and Statement 2

Explanation:-

Properties of a parallelogram:-

The opposite sides are congruent. The opposite angles are congruent . The consecutive angles are supplementary. If one angle is right, then all angles are right. Diagonals of a parallelogram bisect each other. Each diagonal of a parallelogram divides it into two congruent triangles.

Thus, statements 1 and 2 are the correct answer to prove that a quadrilateral DEFG is a parallelogram.

the law of definite proportions states samples of a compound will always contain the same proportion of elements by mass. in other words, a given compound will always contain the same elements in the same proportions by mass.the law of multiple proportions states when two elements combine with each other to form more than one compound, then the weights of one element that combine with a fixed weight of the other are in a ratio of small whole numbers.