Distance from south to North Pole is called?

Distance from south to North Pole is called?

قطب جنوبی سے شمالی قطب کے فاصلے کو کیا کہتے ہیں؟
Explanation

Robert Peary became the first person to reach the North Pole in 1909.

Robert Peary was an American explorer. 

The North Pole of the Earth is located in Arctic Ocean.

Distance from south to North Pole is called Longitude.