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2014-10-02T22:10:40+03:00
P=24
AB=2BC
AB+BC+CD+DA=24
AB≡CD⇒  CD=2BC
BC≡AD⇒ AD=BC
INLOCUIM IN PRIMA RELATIE
2BC+BC+2BC+BC=24
6BC=24
BC=24/6
BC=4
CD=2BC=2·4
CD=8
17 4 17