<prompt> Mzunguko wa pembetatu ABC ni 32. Ikiwa angle ABCangle ACB na BC12, urefu wa AB ni nini?asychora0,0--12,0--6,10--mzunguko,mweusiupana wa mstari1;MarkAngle12,0,0,0,6,10,1,blacklineupana1;MarkAngle6,10,12,0,0,0,1,blacklineupana1;leboA,6,10,N;leboB,0,0,W;leboC,12,0,E;lebo12,0,0--12,0,S;asy  <response>: Kwa kuwa angle ABCangle ACB, basi pembetatu ABC ni isosceles na ABAC. Ikizingatiwa kuwa pembetatu ABC ina mzunguko wa 32, ABAC1232 au ABAC20. Lakini ABAC, hivyo 2AB20 au AB10. 