Răspunsuri

Cel mai inteligent răspuns!
2014-04-03T23:18:05+03:00
Deoarece ΔADB≡ΔCBA, avem

A_{ABCD}=A_{ADC}+A_{ABC}=2\cdot A_{ABC}=2\cdot\dfrac{AC\cdot BE}{2}=10\cdot6=60\ cm^2