Răspuns
Explicație pas cu pas:
Se folosesc asemanarea triunghiurilor si proprietatile rapoartelor
EF/AC=BE/AB EF=8X30/21=11.42
BF/BC=BE/AB BF=8X24/21=9,14
FC=BC-BF=21-9,14=11,86
AE/AB=EG/BC EG=AEXBC/AE EG=13X24/21=18.28
FH/AB=FC/BC FH=FCXAB/BC= 11.82X21/24=10,34
FH/AB=HC/AC HC=FHXAC/AB=10,34X30/21=12,92 AH=AC-HC=30-12.92=17.08
GC=EF, PARALELE INTRE PARALELE GC=11,42
HG=HC-GC=17,08-8=8.08