Răspuns:
AB=BO+AO=3+2=5
AC²=AO²+CO²=4+16=20 ⇒AC=2√5
BC²=BO²+CO²=9+16=25⇒BC=5
P-perimetru
P=AB+BC+AC=5+5+2√5=2(5+√5)
S-aria
S= CO·AB/2=4·5/2 =10
