Answer :
this is pythagorus theorem which is c squared equals a squared plus b squared,
12 squared minus 6 squared equals 108, square root of 108 is 10.39, i don’t know if u have to round it to a decimal place but if u do, tell me
12 squared minus 6 squared equals 108, square root of 108 is 10.39, i don’t know if u have to round it to a decimal place but if u do, tell me