What is the lines of latitude and longitude measured in

The longitude and latitude on a map are measured in angular units called degrees, minutes and seconds. One degree is equal to 60 minutes and 1 minute is equal to 60 seconds.

the answer would be the third option, "no, ariel should have added 9^2 and 12^2 and compared that to 15^2."

this is found through the pythagorean theorem, which is a^2 + b^2 = c^2.

this is the correct way of solving the problem:

9^2 + 12^2 = 15^2

81 + 144 = 225

225 = 225