The continents with the most apparent fit of their coastlines are Africa and South America, forming what is known as the "Atlantic coast fit." This fit is often cited as evidence for the theory of continental drift and the former existence of the supercontinent Pangaea.
It was South America and Africa.South America and Africa
South America and Africa fit together like a puzzle. This matching pattern is known as the continental drift theory, which suggests that the continents were once part of a single landmass called Pangaea.
Africa and South America have the most obvious fit of their coastlines. This is known as the "jigsaw fit" and is evidence that the two continents were once part of the same landmass before drifting apart.
Probably the west coast of Africa with South America.
South Africa and South America.
Africa and South America have the most obvious fit of coastlines, suggesting that they were once joined together as part of the supercontinent called Pangaea.
South America and Africa have coastlines that fit together like puzzle pieces, providing evidence of the continental drift theory. Another example is North America and Europe, particularly the eastern coast of North America and the western coast of Europe, which also show signs of fitting together.
Africa
The first continent wasn't any of the continents we have today. It was a lot of the continents that we know now, all joined together. It is known as Gondwala. The continent eventually broke up into the present day continents, eg. the east coast of South America used to fit into the west coast of Africa.
A map of the continents (with the exclusion of Antarctica and the inclusion of Greenland) is included in the link below and depicts how they would fit together today. They do not completely lock perfectly as their coasts have been eroded.
The theory of plate tectonics suggests that the continents were once connected as a single supercontinent called Pangaea about 300 million years ago. Over time, the continents drifted apart to their current positions due to the movement of tectonic plates. If you were to fit the continents back together based on their shapes, they would fit like pieces of a jigsaw puzzle, particularly the eastern coast of South America fitting into the western coast of Africa.