Răspuns :
ABC=DEF
AB=3cm
BC=7cm
AC=5cm
perimetrul DEF=45
perimetrul ABC=45
laturile DEF?
3+7+5=15
45-15=30
30:3=10
AB=3+10=13
BC=7+10=17
AC=5+10=15
DE=13
EF=17
DF=15
verficare:
13+17+15=30+15=45
AB=3cm
BC=7cm
AC=5cm
perimetrul DEF=45
perimetrul ABC=45
laturile DEF?
3+7+5=15
45-15=30
30:3=10
AB=3+10=13
BC=7+10=17
AC=5+10=15
DE=13
EF=17
DF=15
verficare:
13+17+15=30+15=45