???????????? "dimenshuns" ???????????... me assume yu wanna get leng & wide...how big... leng=2*wide-4... area=leng*wide=wide*[(2*wide) -4]=240... 2*wide^2 -4wide-240=0... wide^2 -2wide-120=0... quadratik equashun giv wide=12 or -10..... wide=12, so leng=2*12-4=24-4=20