There is some relation though. The word ακρωτήρι(ο)=cape. And Sicily is called by the Italians "Trinacria", because of the her shape. See the meaning of the word άκρον in Ancient Greek: https://en.wiktionary.org/wiki/%E1%BC%84%CE%BA%CF%81%CE%BF%CE%BD
Wiktionary also defines this word as "peak, the highest point". Now I know where did the word "acrophobia" come from!
'the tip' is also correct, but marked wrong: https://screenshots.firefox.com/OHsXzGXvNz7SeC0b/www.duolingo.com