Răspunsuri

2014-05-19T15:46:43+03:00
Construiesti rombul ABCD
diagonalele sunt AC, DB
mA=60⇒ΔADB-echilateral⇒DB=6
in ΔAOB, mO=90⇒th Pitagora AB²=AO²+OB²
36=AO²+9
AO²=25
AO=5
AC=10
A=(AC*DB)/2
A=10*6/2=30

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