Since we are asked about the distance from corner to corner, we are to find the hypotenuse. So using the hypotenuse formula:
c^2 = a^2 + b^2
c^2 = 960^2 + 750^2
c^2 = 1,484,100
c = 1,218.24 m
Hence the distance from corner to corner is about 1218 meters.