Answer:
[tex]AC=BD[/tex]
[tex]AB\perp BC[/tex]
Step-by-step explanation:
A parallelogram is a quadrilateral (4-sided polygon) that has two pairs of parallel sides.
In this sense, this figure shows a especial parallelogram called rectangle, since its four sides form right angles ([tex]90\°[/tex]).
Hence:
[tex]AB\parallel DC[/tex]
[tex]AD\parallel BC[/tex]
[tex]AB=DC[/tex]
[tex]AD=BC[/tex]
[tex]AB\perp BC[/tex]
[tex]AD\perp DC[/tex]
So, the correct choices among the given options are:
[tex]AC=BD[/tex]
[tex]AB\perp BC[/tex]