To slay Medusa.
Polydectes sent him because he wanted to marry his mother Danae.
One of the main dangers that Perseus faced was the gorgon, Medusa.
The most common symbol of Perseus, a hero from Greek mythology, is the severed head of Medusa as Perseus is credited with killing Medusa. There is also a constellation named after Perseus.
Perseus was famous for decapitating the Gorgon Medusa.
Perseus was sent to slay Medusa and bring back her head.
To slay Medusa.
Though she was not exactly a 'beast', Perseus was known for slaying a monster, the gorgon Medusa.
He uses the mirrored back of the Aegis to strike at Medusa without looking her in the eyes. He beheaded her, and then put the head in a sack.
The god Hermes aided Perseus by providing him with a sword to slay Medusa and a reflective shield to avoid looking directly at her. Additionally, Athena helped Perseus by giving him a polished shield to help him safely approach Medusa.
He did not, Perseus was sent to fetch the head of Medusa by King Polydektes of Seriphos.
Medusa
The Greek hero Perseus killed Medusa. He took his reflecting mirror and shined it to Medusa. Then, she cut off her head and she threw it into a nearby pond.
Polydectes sent him because he wanted to marry his mother Danae.
Perseus faces external conflict with the gods, particularly with the character of King Polydectes. Polydectes sends Perseus on a perilous quest to slay Medusa in order to get rid of him within the story of Greek mythology.
because perseus killed medusa
The king of Seriphos who sent Perseus on his quest against Medusa was Polydectes.