In the adjoining figure AOB is a diameter,ARC DC =ARC BC,then prove that AD//OC

3 answers

I don't know,plz help me,its important
i)♢PAQ=♢SBR
ii)□PQRB-♢PAB=PQRB-♢SBR
iii)□AQRB=□PQRS
i)BOC=BC
ii)DAB=1/2BD=BC
iii)BOC=DAB
iv)AD//OC