Question

Pls!!!e urgent ,va rog ajutor !!!!

Answer 1

♡BOC ♡AOD { 《ADO= 《BCO(I.P.), [OD]=[OC] (I.P.) , 《AOD= 《BOC (opuse la vf.) } =>ulu=> ♡BOC=AOD=> 1.AD=BC p.s. = e congruent ♡ e triunghi 《 e unghi

Answer 2

Comparăm ΔODA cu ΔOCB:

$\it 1)\ \widehat{AOD}\equiv \widehat{BOC}\ (opuse\ la\ v\hat{a}rf)\\ \\ 2)\ OD\equiv OC\ (ipotez\breve{a})\\ \\ 3)\ \widehat{ADO}\equiv \widehat{BCO}\ (ipotez\breve{a})\\ \\ \\ \stackrel{ULU}{\Longrightarrow}\ \Delta ODA\equiv\Delta OCB \Rightarrow AD\equiv BC$