........................

Explicație pas cu pas:
P=2(BC+DC)=2(8+6)=2*14=28(m)
AP=6/2=3(m)
AM=8/2=4(m)
A (PAM)=AP*AM/2=3*4/2=6(m²)
A(MBCN)=(3+4)*6/2=21(m²)
A acoperita cu gazon=21+6=27(m²)
A (ABCD)=6*8=48(m²)
A (PDNM)=48-27=21(m²)
Deci A (PDNM)=A(MBCN)
Bafta!