Răspunsuri

2014-10-18T15:28:47+03:00
2014-10-18T15:29:20+03:00
Aromb=(d1+d2)/2 
Daca P=20cm -> l=20/4=5cm
AO=CO=d1/2=3cm
In ΔABO cu O=90 ->TP : BO²=AB²-AO²
BO²=5²-3²
BO²=16
BO=√16=4cm
d2=BO·2=8cm
Aromb=(4+8)/2=12/2=6cm