EF⊥AD
AD⊥BC
⊿AEF∽⊿ABD
AE/AD=EF/BD
5/10=EF/9
EF=4.5
AF=√﹙AE²-EF²﹚=√19/2
AD=√﹙15²-9²﹚=12
FD=AD-AF=12-√19/2
⊿EFG∽⊿CDG
FG/DG=EF/CD
FG/﹙FD-FG﹚=4.5/5
FG=﹙216-9√19﹚/38
GD=FD-FG=12-√19/2-﹙216-9√19﹚/38
=﹙120-5√19﹚/19
EF⊥AD
AD⊥BC
⊿AEF∽⊿ABD
AE/AD=EF/BD
5/10=EF/9
EF=4.5
AF=√﹙AE²-EF²﹚=√19/2
AD=√﹙15²-9²﹚=12
FD=AD-AF=12-√19/2
⊿EFG∽⊿CDG
FG/DG=EF/CD
FG/﹙FD-FG﹚=4.5/5
FG=﹙216-9√19﹚/38
GD=FD-FG=12-√19/2-﹙216-9√19﹚/38
=﹙120-5√19﹚/19