R=MN/2=12/2=6 m
m(MQ)+m(NP)=120°
L_MQsiNP=2πR/2=πR=6π m
Fie QW⊥MN
PT⊥MN
QW si PT raze
QW=PT=MN/2=12/2=6 cm
MW+TN=R=6 cm
WT=MN-(MW+TN)=12-6=6 cm
P=L_MQsiNP+QP+MN=6π+6+12=6π+18=6(3+π) m
A'=πR²/2=π*6²/2=36π/2=18π =18*3,14=56,52 m²
QPWT->patrat cu latura de 6 m
A"=l²=6²=36 m²
At=A'+A"=56,52+36=92,52 m²
10%=1/10=0,1
10*92,52/100=9,252
Se cumpara 92,52+9,252 =101.77 m²≈102 m²
