Question

1. which of the following statements is a property of parallelograms?○ adjacent sides are parallel○ no sides are parallel.○ opposite sides are parallel.○ all sides are parallel.

Explanation:

A parallelogram is defined as a quadrilateral with two pairs of opposite parallel sides. Adjacent sides meet at a vertex and are not parallel. "All sides are parallel" is impossible for a 4-sided figure, and "No sides are parallel" contradicts the definition.

Answer:

○ Opposite sides are parallel.