How did wegener deduce what pangaea looked like?

Wegener deduced what Pangaea looked like by identifying matching geological formations, fossils, and rock types across continents. He noticed that the Coastlines of continents fit together like a jigsaw puzzle and suggested that they were once connected as a single supercontinent, which he named Pangaea. By analyzing these pieces of evidence, Wegener proposed that Pangaea existed around 300 million years ago.