On a map town G is 10cm due east of town H and 8cm due south of Town J. hich of the followin is closest to the st line distance, in cm between town H and Town j on the map?

6
13
18
20
24

I tried solving using 64+100=164 which should give the dist as sq rt of 164.
But the solutions given seem to confuse me. SHould the answer be 6?
Can someone pls correct me if i am wrong? Thank you