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Priviti desenul:
........A..........B..................C..........D....
SI COMPLECTATI PT A OBTINE PROPOZITI ADEVARATE:
a)AB+BC=.....,
b)AD-AB=.....,
c)BC+CD=.....,
d)AC-BC=.....,
e)AB+BC+CD=.....,
f)AD-(BC+CD)=.....,
Desenati punctele A B C D coliniare in aceasta ordine astfel incat AB=2 cm BC=3 CD=4 CM.Calculati lungimea segmentelor [AC] [AD] [BD]
DAU CORONITA