I am not sure if there's a word for it, but it would make a lot of sense if there was, sometimes in the "acrobatic arts" people do this, so there might be a specific terminology for it, I suspect there's a word for it, but I might be wrong.
For example:
The cheerleaders ____ to form a big triangle in front of the cheering crowd.
One word that can be used is gathered:
The cheerleaders gathered to form a big triangle in front of the cheering crowd.
As a verb, gathered means:
gather (v.)
To congregate, or assemble.
People gathered round as he began to tell his story.To collect from different places; assemble.
To cause to come together; convene.
(Sources: Wiktionary, Wordnik)
