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Ex.11 .....URGENT!VA ROG!OFER COROANA!!!!!!

Ex11 URGENTVA ROGOFER COROANA class=

Răspuns :

P=2L+2l=322 sau L+l=161
l=L/6
L + L/6 = 161 lx6
6L+L=966
7L=966 =>L=138 m =>l=23 m
Aria=Lxl
Aria=138x23
      =3174 m²
 6l=L   2(L=l)=322m=>2(6l+l)=322m; 2x7l=322m; 14l=322m; l=322/14=23=>L=23x6=138m
 Aria dreptunghi=138mx23m=3174m^2.
    
   BAFTA!!!:)))