Question

There are two concentric circles with centre oad is a chord of a larger circle intersecting the smaller circle at b and c prove that ab=cd

Answer 1

Answer:

Step-by-step explanation:

Draw perpendicular from om to line ad.

Now as we know perpendicular from center of circle bisect the chord it falls on .

So,bm=mc. .........(1)

Similarly,

Am=md. .........(2)

Now ,

Subtract 1 from 2

Am-bm=md-mc

Ab=cd. H.P.