<prompt> Pointi O, A, na B zinatosheleza overrightarrowOA beginpmatrix 1 2 3 endpmatrix na overrightarrowOB anza pmatrix -3 -2 1 mwishopmatrix. Tafuta eneo la pembetatu OAB.  <response>: Eneo la parallelogramu linalozalishwa na overrightarrowOA na overrightarrowOB limetolewa naarrow overrightOA nyakati overrightarrowOB kushoto anzapmatrix 1 2 3 mwishopmatrix nyakati anzapmatrix -3 -2 1 mwishopmatrix kulia kushoto anzapmatrix 8 -10 4 mwishopmatrix kulia 6 sqrt5.asyukubwa wa kitengo sentimita 0.4;jozi A, B, C, D;A 0,0;B 7,2;C 1,3;D B C;choraA--B,Arrow6;choraA--C,Arrow6;kuchoraB--C;choraB--D--C,iliyopigwa;leboO, A, SW;leboA, B, SE;leboB, C, W;asyKwa hivyo, eneo la pembetatu OAB ni 3 sqrt5. 