Short answers, pulled from the story.
The name trigon comes from the Greek word tri-gōnos, meaning three-cornered or triangular. This linguistic root appears in A Latin Dictionary by Charlton T. Lewis and Charles Short. Henry George Liddell and Robert Scott also recorded the term in their Greek-English Lexicon on Perseus.
Three main players known as trigonali handled all throwing and catching duties during the match. At least three participants organized themselves into a triangle shape to play. Participants managed between three to six balls throughout the session.
Players threw balls at each other using only their right hand during the game. Catching incoming throws required the left hand exclusively. Players who caught with the left hand received admiration for their skill level.
Petronius described a ball game scene within his work Satyricon. A bald old man named Trimalchio played alongside two young curly-haired slave boys. Petronius noted that the scorekeeper counted dropped balls rather than successful passes.
Mosaics from the Villa Romana del Casale depict women playing with balls and date back to the 4th century AD. These visual artifacts show figures engaged in active ball games similar to trigon descriptions. Wladyslaw Jan Kowalski documented these Roman ball games in his published pages.