Apilot flies a plane south and then 600 miles west, where she lands the plane. how far did the pilot fly the plane if she lands 610 miles from the starting point

From problem above, the pilot will make a right triangle. First find the length the missing side and then add all lengths to get total length.
Use pythagorean theorem to find the length of a.
a^2+b^2 = c^2
where
a = ?
b= 600 miles
c= 610 miles
substituting the variables, this will give us
a = 110 miles
Total length = 110+600+610
                    = 1320 miles 
The plane flew 1320 miles.