Question

Someone explain question no 9?

Answer 1

It's a property bro.

If four points lie on a circle then they are called concyclic points and property

OA X OB=OC X OD

Answer 2

Answer:

Step-by-step explanation:

SINCE THESE FOUR LINES(OA,OB,OC AND OD) LIE IN THE SAME CIRCLE THESE ARE SAID TO BE CONCYCLIC AND HENCE

OA*OB=OC*OD

HOPE THIS HELPS!