Helen draws three parallelograms. in each figure, she measures a pair of angles, as shown. which conjecture is reasonable for helen to make? in a parallelogram, opposite angles are acute. in a parallelogram, consecutive angles are congruent. in a parallelogram, all angles are congruent. in a parallelogram, opposite angles are congruent. 13p !

D. In a parallelogram, opposite angles are congruent.

Step-by-step explanation:

In each case, she measures two opposite angles, and they are congruent.

D. In a parallelogram, opposite angles are congruent.

D.In a parallelogram, opposite angles are congruent.

Step-by-step explanation:

We are given that Helen draws  three parallelograms.

We have to find conjecture which is reasonable for Helen to make.

We know that in parallelogram opposite angles are congruent.

Opposite sides of parallelogram are equal and parallel.Consecutive angles are supplementary.

In each figure, opposite angles are congruent.

Therefore, option D is true.

D.In a parallelogram, opposite angles are congruent.

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