Question

9 C va rog, nu reușesc sa îl fac nicicum..​

Answer 1

At=Al+2Ab

At-Al=2Ab

Ab=(At-Al)/2=(200 cm^2-56 cm^2)/2=144 cm^2/2=72 cm^2

Ab=L*l

L=Ab/l=72 cm^2/8 cm=9 cm

Al=2(L*h+h*l)=2h(L+l)

h=Al/2(L+l)=56 cm^2/2(9 cm+8 cm)=56 cm^2/2*17 cm=28 cm/17