Answer:
The sentence which is always true for a parallelogram is:
D: Opposite angles are congruent
Explanation:
Parallelogram--
A parallelogram is a polygon with 4 sides such that it has 2 pair of opposite sides which are parallel.
The properties of parallelogram are as follows:
- Opposite sides are congruent
- Opposite angles are congruent.
- Diagonals of a parallelogram bisect each other.
- Consecutive angles are supplementary.
The correct answer is: Option: D.