D-------------------------------------------C
l l
l l
l l
l________________________ l
A B
P=AB+BC+CD+DA=AD+CD+AD+CD=2(AD+CD)=2(AD+108)
AD conform teoremei lui Pitagora este:
AD^2=BD^2-AB^2=BD^2-CD^2=192^2-108^2=
(192-108)(192+108)=84x300=25200=3600x7=(60^2)x7
AD=60V7cm, "V"=radical
P=2(60V7 +108)=24(5V7 +9)=24(9+5V7)cm
Undeva ceva nu e in regula, in primul rand nu se justifica M (nu foloseste la nimic) si nici 840cm n-am obtinut.
Daca faci vreo corectie in enunt revin.
