The Allegheny and Monogahela rivers joinb at Pittsburgh to form the Ohio River.
The Republican and Smoky Hill rivers join at Junction City, Kansas to form the Kansas River.
The confluence of the Alleghaney and Monogahela Rivers form the Ohio River at Point State Park in Pittsburgh. Thus the three rivers that "come together" at that point are the Ohio, Allegahaney and Monogahela.
Rivers and streams that flow in to a larger river are called tributaries. They all form in the same spot.
The Monongahala River (i'm not quite sure i spelled that right), and the Allegheny River
the Congo river
Allegheny River (from the North East) and the Monongahela River (from the South East) meet to form the Ohio River.
Western Pennsylvania, where the Allegheny and Monongahela rivers join to form the Ohio River.
As tributaries form to enlarge the river, distributaries form if there is a delta, but few rivers divide compared to those that only have smaller rivers contributing to them. No, they dont separate into separate watercourses.
The rivers Swale, Ure, Nidd and Wharfe all join the River Ouse in North Yorkshire. In South Yorkshire there are the Rivers Don, Rother and Sheaf. In West Yorkshire is the River Calder. They all merge to form the River Humber.
The Broad and Saluda Rivers combine to form the Congaree River. Columbia is just above the confluence of the Broad and Saluda Rivers.
The Persian Gulf.