Posted by Nina on Wednesday, January 1, 2014 at 10:58am.
A plane flies due east for 120 km from airport a to airport b it then flies due north for 280 km to airport c finally it flies directly back to airport a calculate the direct distance from airport to airport a give your answer to the nearest kilometre

Math  Steve, Wednesday, January 1, 2014 at 1:00pm
If the distance from a to c is d, then
d^2 = 120^2 + 280^2
d = 40√58