Question

cum se rezolva problema 4??

Answer 1

patrat: l=10:4=2.5

          A=2.5*2.5=6.25

cerc: P=10m, P=2*$\pi$*r  =10

        A= $\pi \pi$*r*r

$\pi$*r=5

3.14*r=5

r=1.6

A=5*1.6=8