Răspuns:
AE/EB=AF/AC <=> 12/18=10/15 <=>2/3=2/3
AC=20
FC=15=>AF=5 AE/AB=AF/AC <=>4/16 =5/20 <=>1/4=1/4
AB=28
EB=21=>AE=28-21=7
AE/EB=AF/FC <=>721=6/18 <=>1/3=1/3
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Răspuns:
AE/EB=AF/AC <=> 12/18=10/15 <=>2/3=2/3
AC=20
FC=15=>AF=5 AE/AB=AF/AC <=>4/16 =5/20 <=>1/4=1/4
AB=28
EB=21=>AE=28-21=7
AE/EB=AF/FC <=>721=6/18 <=>1/3=1/3