You see how much the scale is, let's say that it is 150 mm=300 miles. If it goes over, you can measure it with a ruler, or move with your hands, measuring it as well as possible and estimating. Hope this helps! :)
The island of Guam is located at 13° 28' 0"N, 144° 46' 59" E
Answer:
1) map A is small scales and Map B is large scales maps