No, Pangea, the supercontinent that existed during the late Paleozoic and early Mesozoic eras, had already broken apart by the time the asteroid impact occurred and led to the extinction of the dinosaurs. The breakup of Pangea started around 200 million years ago through a process called continental drift, which gradually separated the landmasses into the continents we recognize today.
The asteroid impact, known as the Chicxulub impact, took place approximately 66 million years ago at the end of the Cretaceous period. By that time, the continents had already assumed a configuration somewhat similar to their present-day positions. The landmasses were spread across the Earth's surface, although they were not in their current shapes and sizes.
The breakup of Pangea began during the early Mesozoic era, around 200 million years ago, and continued over millions of years. By the time of the dinosaur extinction event, the continents had already started to take on their recognizable forms, such as Laurasia in the northern hemisphere and Gondwana in the southern hemisphere. Pangea's breakup was a gradual process that occurred long before the asteroid impact event.