Răspunsuri

2014-05-23T19:06:27+03:00
D=l√2
d=6

l√2=6
l=6/√2  rationalizam

l=6√2/2=

l=3√2

A=l²= (3√2)²= 18
2014-05-23T19:09:35+03:00
Teorema lui pitagora in Δ ABC (Ac=diagonala)
AC²=AB²+BC²=>AC²= 2AB² (AB=BC)
                         36=2AB²=> AB=√18=> AB=3√2=l
A patrat= l² => A=18 cm²