The solution is AF=3 and AG=2.
DF=2
DG ^2 = 13 - 4 = 9
DG = 3
CG=2
AB/DG= 1/3
Triangle ABM is similar to ADE
BM/AB= 3/sqrt( 10)
BF/BC= 1/sqrt( 10)
MF = BM-BF = 2/sqrt( 10)
MNRT circumference = 8/ square foot (10)
Sqrt stands for square root.