This is not strictly true since the theory of epicycles certainly predates Apollonius. Nevertheless, Apollonius did make substantial contributions particularly using his great geometric skills.
Ito ay hindi mahigpit na totoo dahil ang mga teorya ng epicycles tiyak predates Apollonius. Gayon pa man, Apollonius did gumawa ng malaking kontribusyon lalo na ang paggamit ng kanyang apo geometriko kakayahan.