Răspuns :
Ordinea lor pe dreapta e asa: D->A->C->B
AC=AB-BC
AC=12-8
AC=4cm
CD=AD+AC
CD=6+4=CD=10cm
BD=AB+AD
BD=12+6
BD=18 cm
AC=AB-BC
AC=12-8
AC=4cm
CD=AD+AC
CD=6+4=CD=10cm
BD=AB+AD
BD=12+6
BD=18 cm