Final answer:
The chordophone used in Ancient Greece to play in contests and festivals is the lyre.
Step-by-step explanation:
The chordophone used in Ancient Greece to play in contests and festivals is the lyre. The lyre is a stringed instrument with a U-shaped body and strings attached to a crossbar over the top. It was a popular instrument in Ancient Greece, often associated with the god Apollo and used in various musical performances and religious ceremonies.
Learn more about Ancient Greek music